Different species of bacteria have different types of
flagellar motors. Some run off protons (H+), and some
run of sodium ions (Na+). The sodium motors spin up to five
times faster than their proton counterparts. Earlier work had shown that
mutations to a certain protein MotA in the proton motors could cause
failure. These researchers mutated the homologous protein PomA in
the sodium motor and still got it to work, so apparently there are other
unknown factors involved in torque generation in these varieties.
Scientists now have the ability to
substitute individual letters in the genetic alphabet and the protein
sequence and see what breaks. As in language, you can substitute
some letters and still get meaning; kold for cold, for instance.
Others are more damaging, like hit for hot. Some changes can create
opposites, like just adding the prefix a turns
moral into amoral. Similarly, protein
sequences can tolerate some changes, but others bring the function to a
halt. A key research technique these days is to watch what happens
with gene substitutions. More often than not, function breaks;
sometimes it continues in a weakened state or makes no difference, but
never does new functionality arise.
Whats interesting in this story is the fact that
these researchers have no hesitation whatsoever in calling these things
motors and machines, and referring to their parts as rotors and stators.
The skeptical philosopher David Hume used to contend that you could not
compare living things
to artificial contrivances, like watches, to support the argument from
design. But now, molecular machines are all the rage
in cell biology, and nanotechnologists are imitating nature in their
engineering. The bacterial flagellum is one of the amazing
examples of irreducible complexity that
Michael Behe brought to the limelight
in his book
Darwins Black
Box. Behe talked about the
cell being made up of actual molecular machines that act just like
man-made machines, only orders of magnitude smaller. As in
artificial machines, the components have to be simultaneously present
and fit one another, or else there is no function. The same is
true in the bacterial flagellum, which is made up of at least 30 protein
parts, including a rotor, stator, drive shaft, propeller and a complex
ion-drive torque generator that is still poorly understood.
The protein
these scientists thought was responsible for torque generation turns out to
be more related to switching directions
rather than torque. But again, small changes to the parts are seen to
cause breakdowns: in this study, decreases in swarming behavior, but not
an improved motor.
It is inconceivable that this smoothly integrated system
of mechanical parts could arise by small, intermediate steps, each of which
would require an advantage big enough to aid survival of the
whole organism.
Also, as the film referred to above emphasizes, no evolutionist ever talks
about the origin of the genetic instructions to build these
machines. That is never addressed by opponents of the irreducible
complexity argument, says Dr. Scott Minnich in the film. What we
observe in fact, reminds Jonathan Wells, is irreducible complexity all
the way down. The authors of this paper never mention evolution
once, in accord with our frequent observation that evolutionary speculations
are inversely proportional to the data available for analysis.
Next headline on: The Cell and Biochemistry.
Next headline on: Intelligent Design.
Upside Down: Family History of Brown Algae 06/24/2002
Researcher turns brown algae phylogeny upside down, reads
the title of a press release from the
Netherlands
Organization for Scientific Research.
The work of Stephen Draisma of Leiden University claims that
few of the currently assumed relationships between the orders are
correct. Furthermore, it transpires that some simple species arose
not earlier but later than more complex species. The algae
expert proposes classifying brown algae, which include the seaweed that
washes up on beaches and the giant kelp forests off the coast of
California, into 20 orders instead of the usual 13.
The story was echoed on
EurekAlert,
the news service of the American Association for the Advancement of Science.
Maybe textbooks should proclaim a new
dogma for the genomics era: The genomes of plants and animals reveal the
devolutionary history of life on earth. Devolution is a fact.
Next headline on: Plants.
Next headline on: Darwinism and Evolutionary Theory.
Martian Grand Canyon Formed by Dam Breach 06/21/2002
Evidence for a canyon bigger than earths Grand Canyon
has been announced in the
June 21
issue of Science. Apparently a large lake over a million
square kilometers in size overflowed
its natural dam and gouged out the gorge in short order, flowing into
a large crater. For a color picture of the proposed flood
scenario, see the
June 27
Astronomy Picture of the Day.
They even call this an event during the
Noachian epoch. Creationists have been saying this is
how earths Grand Canyon formed catastrophically, not
slowly and gradually and earth has the water to do it, but Mars
today is dry. If on Mars, why not on the Water Planet?
Next headline on: Mars.
Next headline on: Geology.
Horseshoe Crabs Represent an Evolutionary Freeze-Frame 06/21/2002
National Geographic
posted an article about the mysterious horseshoe crabs, that lay
their eggs this time of year.
How long horseshoe crabs live, whether they return to the beach of their birth for spawning, why their life cycles seem directed by the moon, where they disappear to for the other 10 months of the year-all these questions remain mysteries.
Somehow, the horseshoe crab has thrived for 500 million years, and Sue
Schaller wants to know why. Youve got an animal that
predates dinosaurs by 200 million years, and it hasnt changed
much at all. It hasnt had to evolve, said Schaller, a
biologist who has studied Maines horseshoe crabs for the past
three years.
Horseshoe crabs, the article explains, are not really crabs, but
chelicerates, more closely related to spiders and mites and trilobites.
Their mysterious mating ritual is timed to swoon under the new moon in June.
It hasnt had to evolve is
a subtle personification fallacy;
did you catch it? Its ubiquitous in Darwinspeak.
Does the horseshoe crab care whether it evolves or not, or dies or
not? Does Mother Earth care? Does the sea? Nobody cares;
it doesnt have to do anything. Evolve or
perish! goes the simplistic bumper sticker, but according to
naturalism, perishing is just as wonderful as surviving, because lots
of species have perished, and only humans seem to give a hoot.
Horseshoe crabs are one of many living fossils.
Again we must ask, if evolution is this pervasive force that gives
rise to so much diversity, why would an organism like the horseshoe
crab not evolve just a little bit at least during all the time that dinosaurs
went from chicken-size lizards to brachiosaurs and triceratops, and then to
eagles and ostriches, and shrews went from elephants to whales and bats and
kittens and people? Thats a lot of time and mutations and
natural selection, but horseshoe crabs still do their little moonlight
fling, oblivious to all this change going on around them, and
also to the three alleged meteorite catastrophes that wiped out 95% of
life on earth. Maybe not only horseshoe crabs are moonstruck (def:
affected by or as if by the moon; mentally unbalanced; romantically
sentimental; lost in fantasy or reverie).
Next headline on: Bugs and Arthropods.
Rock-Throwing Preceded Tool-Making 06/21/2002
According to
Nature Science
Update, our early ancestors mastered the art of throwing stones
before they realized they could make tools out of them. Reporting
on the work of Alan Cannell, who published in the
Journal of
Archaeological Science, the thinking is that Our instinctive feel
for the ideal projectile could explain the design of hand-grenades, the
collecting habits of geologists, the size of handballs and the weight of
the imperial pound,... and could illuminate the lives of
prehistoric hominids. Cannell found that everybody seems to
prefer rocks about a half a kilogram. We are looking for something
hardwired that recognizes the ideal mass and is involved in throwing.
This would show that throwing was, at some stage of our evolution, of
vital importance.
What, pray tell, does this have to do
with evolution? Observation: people like to throw rocks (just watch
any 10-year old kid.) Observation: people are a certain size
(if people were as big as elephants, we would probably pick up bigger
rocks). Does this tell us anything about ape in our ancestry?
If a person did not already believe humans evolved from apes, would this
article prove anything at all, other than people shouldnt live in glass
houses?
Next headline on: Early Man.
Next dumb story.
Comets Remain a Puzzle 06/21/2002
The fading problem of the Oort Cloud hypothesis
(a severe deficit in the number of comets observed in short-period orbits like
that of comet Halley) is addressed in a paper by Levison et al in the
June 21
Science. They believe that based on the unexpected
distribution, the majority of comets must disrupt, but that raises the
question of why a body would disrupt, when only exposed to the solar wind,
and also where does the mass go. On June 28,
Sky
and Telescope posted a report on this story, The case
of the missing comets.
In a Perspective piece in the same issue of Science,
Mark E.
Bailey leaves the problems unresolved: At present, comets
remain a puzzle: They have to be both strong and weak, and there seems
to be a substantial missing mass. Does this provide a clue to the
origin of cometary material?
Maybe, if one is open-minded enough to
question the long ages of comets. Students are taught the glib
generality of the Oort Cloud hypothesis on TV programs and student
astronomy books illustrated by artists, but few are ever exposed to the
weaknesses of the theory. And there are weaknessessevere
onesas this story reveals. Maybe comets havent been
around for 4.5 billion years. Bailey reveals why this explanation
is not preferred: Could the steady-state assumption be mistaken?
This would put us in the uncomfortable position of living at a special epoch,
perhaps within a few million years of the start of a comet shower,
with all sorts of attendant repercussions... but this is merely
a philosophical bias. We think students should be told the points
for an against a popular theory. It might stimulate them to go into
science to explore mysteries like this. Biblical creationists dont
have this comet problem, because they dont accept the long ages that
are spoon-fed to the public for unquestioning acceptance. For a
controversial but detailed alternative view, see the theory for the
origin of comets by
Dr. Walter T. Brown, and judge for yourself whether Oort or Brown can handle the
data and the anomalies.
Next headline on: Solar System.
Next headline on: Dating Methods.
Adult Stem Cells Show Promise 06/20/2002
Researchers at the
University
of Minnesota got adult bone marrow stem cells to reproduce all the
tissues of the body, reports
Science magazine.
Catherine Verfaillie and team may have found a universal stem cell that
is not derived from embryos. Her paper is published in the
June 20 Nature.
This is wonderful news, if confirmed, that
might reduce the ethically troubling practice of harvesting embryonic
stem cells. Another research the same day announced progress in
treating Parkinsons disease with stem cells in rats.
Opponents of the use of embryonic stem cells argue that it isnt
right to kill one human to save another, but if adult stem cells can
do everything the embryonic stem cells seem able to do, the controversy
may become moot. But it is still too early to say one way or the
other, according to this perspective article on the controversy in
June 21 Science.
Next headline on: Health.
Next headline on: Politics.
Debate 06/20/2002: On the
Access
Research Network website, Jonathan Wells, author of the anti-Darwinist
book Icons of Evolution, answers
the rave reviews he has gotten from critics.
He responds to the charges that he is either (1) ignorant, (2) stupid,
(3) wicked, or (4) all of the above. He argues for (5) none of
the above.
Next headline on: Darwinism and Evolutionary Theory.
Debate 06/20/2002: On the Answers
in Genesis website,
Jonathan
Sarfati takes on John Rennies article in the
June 17 Scientific
American, 15 answers to creationist nonsense.
Responding with 15 ways to refute materialist bigotry: a point by
point response to Scientific American,
Sarfati answers each of Rennies claims in turn, dealing with
transitional forms, natural selection, irreducible complexity, theories
in science, fossils, the second law of thermodynamics, and other subjects.
His rebuttals include links to additional articles that go into more
detail. A shorter rebuttal by Bill Hoesch can be found on the
Institute for
Creation Research website.
In the same issue of Scientific American,
professional skeptic Michael
Shermer psychoanalyzes the vox populi who question
evolution, particularly those who wrote responses to his
February article
attacking intelligent design. He concludes,
With no subject is this as apparent as it is with evolution; it is here
we confront the ultimate question of genesis and exodus: Where did we
come from and where are we going? No matter how you answer that
question, facing it with courage and intellectual honesty will bring
you closer to the creation itself.
By creation he means, of course, the materialistic big bang hypothesis, and
by genesis and exodus he refers not to the Bible but to the beginning and
end of the universe and human existence. By intellectual honesty
he means materialistic philosophy (in his phraseology, the advance of
science).
In his opening rebuttal, Sarfati points out the irony that the founder
of Scientific American, Rufus Porter, was a creationist, who started
the magazine for the glory of God, and purposed that We shall advocate
the pure Christian religion, without favouring any particular
sect. You can read the purpose statement and
Porters own beliefs on Rational Religion (i.e., daily
acknowledging our our Creator and daily Preserver with prayer
and thanks and worship, resulting in love to our fellow beings) online in the
magazines
first issue,
August 28, 1845.
Next headline on: Intelligent Design.
Next headline on: Darwinism.
Book 06/20/2002: Things
Come to Life: Spontaneous Generation Revisited by Henry Harris,
Oxford University Press, released 06/15/2002. Describes historical
experiments by Redi, Leeuwenhoek,
Spallanzani, Pasteur and others.
Reviewed in
Nature June 20 by Paolo
Mazzarello, who says, Philosophy and theology are not entirely
absent in this book (a brief chapter is entitled Materialism, For
and Against), but its main aim is to describe the principal
experiments and to judge what we can consider, in hindsight, to be
right and wrong. So this is more a book of facts than of opinions
about the facts, and more of experimental evidence than of the
philosophical consequences.
Next headline on: Origin of Life.
Nature Hedges on Earliest Fossil Claim 06/20/2002
A Nature News
Feature June 20 raises doubts about Bill Schopfs claim of
finding cyanobacteria fossils in 3.5 million year old Australian
rock (see March 7 headline).
Contradictory claims were made by
Schopf and Martin Brasier
in the March 7 issue. The article portrays Schopf as a fighting
advocate not willing to back down in the face of controversy, and dodging
claims that he knew of contrary evidence early on from his own colleagues.
The astrobiology crowd appears eager to discount the claim
because they cannot bear to have oxygen abundant on the
early earth, but if the dating methods are based on
circular reasoning, then both are wrong.
Next headline on: Fossils.
Are Animals Over-Designed? 06/19/2002
Animals appear to have built-in safety factors, or capacities
beyond their normal load, such as bones being stronger than their usual
needs, peak milk output of mammary glands exceeding a pups needs,
and an enzymes maximum reaction rate exceeding its normal
reaction rate. Scientists at the University of California School
of Medicine did an experiment to test rats ability to process
glucose at higher than normal rates, and wrote their results in
the June 19 Proceedings
of the National Academy of Sciences. They found a 220%
safety factor; i.e., rats were able to consume and assimilate 2.2 times
as much glucose as their body needs.
This paper by noted evolutionist
Jared
Diamond and colleagues is listed in the category Evolution, but does it not
indicate intelligent planning? Why would natural selection give a rat
reserve capacity more than it needs to survive? The authors say their
result is at the low end of observed biological safety factors, which can be
as high as 700%, and say this observation is one of the
major problems in quantitative evolutionary design (hows that
for an oxymoron: evolutionary design). They give some possible
reasons for this apparent overdesign, but all that can be said is that this
finding gives no advantage to evolutionary explanations over design
explanations; if anything, it is another problem for evolutionists to
puzzle over.
Next headline on: Mammals.
Next headline on: Intelligent Design.
All Wrong: The Classical Darwinian Doctrine of Common Descent 06/18/2002
Thats what Carl Woese of the
University of
Illinois at Urbana-Champaign thinks, speaking about how the first life
originated: We cannot expect to explain cellular evolution if we stay
locked in the classical Darwinian mode of thinking Woese said.
The time has come for biology to go beyond the Doctrine of Common
Descent. So is Woese a creationist? Not in the slightest;
he proposes that three separate chemical processes led to the origin of
life. His argument is built around evidence from the three
main cellular information processing systems - translation,
transcription and replication - and he suggests that cellular evolution
progressed in that order, with translation leading the way.
Woese puts greater emphasis on horizontal transfer of information between
living things and non-living precursors. And where did the first
information come from? The pivotal development in the
evolution of modern protein-based cells, Woese said, was the invention
of symbolic representation on the molecular level - that is, the
capacity to translate nucleic acid sequence into amino acid
sequence.
Scientific
American has a summary of the paper that is published in the
June 19 Proceedings
of the National Academy of Sciences.
Evolutionists are such cheaters.
They sneak in information in the unobservable past, when nowhere in the
world is information do we see information arising from nonintelligent
causes. Woese, like all the others,
personifies molecules inventing
symbolic representation and translation capabilities, essentially
pulling information out of the magic
hat. The value of this article is that one evolutionist is
telling the others Everything you know is wrong.
Its kind of fun to watch them do that to each other.
Woese is just hand-waving out of thin air. He
pictures molecules inventing all kinds of capabilities as if they were
shipwreck victims landing on an island and figuring out how to work
together and build a village and a government. We need to call
foul when evolutionists play these games. In reality, this paper
is very damaging to the chemical evolutionists. Before he dives
into this murky world of cellular evolution, as he terms
it, he begins: The evolution of modern cells is arguably the most
important problem the field of Biology has ever faced.
In Darwins day the problem could hardly be imagined. For
much of the 20th century it was intractable. In any case, the
problem lay buried in the catch-all rubric origin of life
where, because it is a biological not a (bio)chemical problem, it was
effectively ignored. The problem is not solved by
imposing pantheistic wish-fulfillment upon inanimate objects,
in contradiction to their own naturalistic premise. Exchanging
ignorance for fantasy is not progress; ignorance is the lesser of
two evils.
Next headline on: Origin of Life.
Next headline on: Darwinism.
Cell Journal Marvels at Complexity, but Assumes Darwinism 06/17/2002
Book reviews in scientific journals allow scientists to back off from the
detail and jargon of a specific paper and comment on the big picture.
The June 14 issue of Cell
is loaded with book reviews that are a study in contrasts.
Details of cellular complexity and design are juxtaposed with simplistic
evolutionary explanations. Some examples (emphasis added):
- Standard Textbook: Patrick
Williamson reviews the standard text Molecular Biology of the Cell
(4th ed., 2002) and refers to the dramatic
complexity of the cytoplasm that began to be revealed with
electron microscopes in the 1950's. But in the end, he
attributes it all to natural selection in cobbling together
solutions to pressing problems using the miscellaneous materials
presented by gene duplication and mutation ...
In the past, we have sometimes spoken in
deprecating tones of our scientific predecessors stamp-collecting
their way through the characterization of the phylogeny and life
histories of the earths species. Now, the genome projects have
presented us with new sets of stamps to collect, characterize,
describe, and explain. Like our predecessors, we cant usually
reduce our insights into a few general principles because of the way
organisms have evolved, but we can always anticipate growing
satisfaction with the detail and clarity of our understanding of all
the many instances we find.
- Mind Boggling Complexity: Max
Gottesman, in a review of Genes & Signals by Ptashne and
Gann (2001), slaps his head over the complexity of enzyme actions:
Recall the days of yesteryear when, for biologists, enzymes were
enzymes and didnt need any help in finding their
substrates. Alas, those simple times are long gone. Instead
we are faced with the horrible realization that proteins rarely see
their ligands without being led by the nose to them. So, for
example, RNA polymerase once promptly landed on a promoter and revved
up to transcribe a gene. It turns out, in fact, that for most
promoters, RNA polymerase requires additional proteins just to find the
site. And other proteins interfere with its attachment. The
number of such auxiliary factors, especially in eukaryotes, is mind
boggling ... The situation is
scarcely better in signal transduction. A hormone can only relay
its message to the nucleus via passage through a long series of
proteins, most of which have to be spatially constrained to transmit
the signal. Even the simple matter of removing a piece of
unwanted RNA from a transcript involves the assembly of a dozen or so
proteins and RNAs, probably in a configuration that is highly
specific. The reason for all this is now quite clear.
Transcription cannot be ubiquitous, but is regulated by factors that
respond to cellular environment, cell type, phases of the growth cycle,
etc. Similarly, transduced signals are not sprayed around the
cell, but are channeled toward specific effectors, as determined by the
special requirements of the cell at a particular point in time.
- Extreme Life: Thomas
Cavalier-Smith takes a hard look at D.A. Whartons
Life at the Limits: Organisms in Extreme Environments (2002). He
likes the treatment of extremophiles and cryptobiotic organisms (those
that can go into states of suspended animation), but criticizes his sparse
treatment of the origin of life. He believes, contrary to the
author, that eubacteriaflagella and allare our ancestors,
not archaebacteria:
The origin of biomolecules is much easier to understand if it occurred
in a heterogeneous environment with geothermal activity to condense
polymers and numerous small cool pools subject to freezing and drying
to stabilize and concentrate them. The breakthrough to the
first organisms in which membranes, genes, and catalysts cooperated is also
much easier to understand in a cool heterogeneous environment such as
polar tide pools (Cavalier-Smith, J. Mol. Evol. 53, 555-595,
2001). It seems much more likely that early proto-organisms were
cryptobiotes, able to survive temporary freezing or drying, than
thermophiles having to evolve the genetic code and membranes beside
oceanic vents in the enormous volumes of the deep ocean, as seems
currently popular in some circles.
- Nuclear Pores: Amnon
Harel and Douglass Forbes review Nuclear Transport
(Karen Weiss, ed., 2001) and note some wonders of the nuclear pore complex:
During the splicing process, mature mRNA,
a very large cargo, appears to form a complex with a variety of distinct
non-importin beta-type proteins that together mark the mRNA for export
and participate in its egress from the nucleus. ...
Indeed, it has been very difficult to confirm a specific translocation
mechanism for the nuclear pore, which contains multiples of 30-50
different proteins in the final 500-1000 protein nuclear pore complex.
- RNA Complexity: Martha J.
Fedor reviews RNA (ed. Soll, Nishimura and Moore, 2001) and
notes the bewildering complexity of RNA functions in this growing
complicated field:
The discovery that RNAs could catalyze biological reactions gave a
clear indication that RNAs would not conform to the Central Dogma,
which dictates that they exist solely to relay information between DNA
genes and protein gene products. Over the ensuing decades, RNAs
have turned up unexpectedly as key players in myriad cellular
activities, both fundamental and exotic. ...
A new class of tiny noncoding RNAs (microRNAs) recently was implicated
in developmental and spatial regulation of gene expression (Ambros,
Cell 107, 823-826, 2001). Really, it would be surprising
if nature has stopped here in making use of this versatile
macromolecule.
- Molecular Machines: Ishii and
Yanagida review Biology at the Single Molecule Level
(ed. Leuba and Zlatanova, 2001) and show that the discovery of molecular
machines is forcing a paradigm shift:
The history of science has shown that new concepts frequently emerge
and interpretations of the data become modified as more sophisticated
and accurate measuring systems are developed. New data allow us
to emphasize different aspects of biological systems and to reveal
aspects of those systems that had not previously been unveiled. ...
As nanotechnologies have expanded, many researchers have realized that
the laws that govern materials of nanometer size are very different to
those applied to macroscopic machineries with which we are more
familiar. Nature, however, has already developed and utilized
nanotech. Life is full of nanomachines, and their functions are
very different from artificial nanomachines. ... Researchers now know
that protein molecules are more complex than the simple design the DNA
information implies. Studying the mechanism underlying protein
functions is intriguing, and prerequisite are the techniques that allow
us to monitor the dynamic structure of protein molecules and directly
detect the functions of proteins.
- Homology and Evo-Devo Richard
R. Behringer in Hand of man, wing of bat, fin of porpoise
reviews The Evolution of Developmental Pathways by
Sunderland (2002). He thinks Evo-Devo is the wave of the future:
Biologists have always been fascinated by the astonishing diversity of
metazoan life that has evolved on Earth. It is now evident that
extant species have evolved from common ancestors through genetic
changes that are acted upon by natural selection. In The
Origin of Species (1859), Charles Darwin discussed the law of
embryonic resemblance. He and others before him had noted
that plants and animals within the same great classes, though
morphologically diverse in their adult forms, were remarkably similar
in their embryonic forms. For example, the limbs of vertebrates,
including the hand of a man, wing of a bat, and fin of a
porpoise, are morphologically and functionally distinct, yet they
all develop from morphologically identical limb buds in their
embryos. Darwin suggested that the embryos of different species
provided a glimpse of a common parent for the different classes of
organisms, supporting his concept of descent with modification.
Thus was born the field of evolutionary developmental biology.
He goes on to discuss the various controversies, questions, problems
and conundrums in the field of evo-devo, but concludes it has a
bright future thanks to television:
Finally, the current movement in the Evo/Devo field suggests a bright
future. That future may be driven by those children who watched
natural history programs on television and have been inspired to pursue
studies and careers in biology. I predict that these young
biologists will not be satisfied studying a handful of primary model
organisms. I suspect that these enlightened individuals will have
broader interests and will be naturally attracted to the Evo/Devo field
to reveal the hidden bond described by Darwin that exists
between common ancestors and current species.
- From Cytoplasm to Cytoskeletons Don Ingber
in Putting the Cell Biology Establishment on the Stand
reviews Cells, Gels and the Engines of Life by Pollack (2001).
He slays the dragon of misconceptions that the cell is simply a bag
of fluid:
While our knowledge of the molecular widgets that comprise living cells
has exploded beyond our wildest dream, our understanding of cell
architecture and the relation between structure and function still
remain rudimentary. For example, one mainstream cell biology
textbook defines the cell as a small membrane-bounded compartment
filled with a concentrated aqueous solution of chemicals, like a
balloon filled with molasses. In fact, many biologists who work
with molecules in isolation still share this view, as do virtually all
lay people, including the congressmen and women who decide which
science projects the government will invest in. Pollack views
this image as a dragon that must be slain and I cannot agree more.
The living cell is a chemo-mechanical machine and it uses all forces
and devices at its disposal-physical as well as chemical and
electrical-to carry out its miraculous tasks. The reality is that
the cytoplasm is a molecular lattice, known as the cytoskeleton, that
is permeated and insufflated by an aqueous solution. The
different molecular filaments that comprise the
cytoskeleton-microfilaments, microtubules, and intermediate
filaments-position the cytoplasmic organelles. But this is not a
passive support system. The same scaffolds orient many of the
enzymes and substrates that mediate critical cell functions, including
signal transduction, glycolysis, protein synthesis, transport, and
secretion; analogous insoluble scaffolds mediate RNA processing and DNA
replication within the nucleus. This use of
solid-state biochemistry greatly increases the efficiency
of chemical reactions because they are no longer diffusion limited, and
it provides a means to compartmentalize different cellular
activities. The cytoskeletal system also can dynamically grow and
shrink within different microcompartments as a result of the action of
specific molecular regulators. ... Indeed, it is through these varied
functions of the cytoskeleton that living cells can exhibit behaviors
that are far beyond anything observed in man-made materials. The
abilities of a cell to move its entire mass upstream against the flow
of blood or contract against hundred pound weights are two simple
examples.
He critically examines Pollacks
attempt to pull a simpler, unifying framework out of the new complex
picture of cell processes.
Two things should be clear from these examples:
observational science reveals bewildering complexity and design in the
cell; Darwinian stories, however, are just
glittering generalities and
personification fallacies.
It is a violation of their own naturalistic principles to portray
Nature as a miracle-working goddess. Give honor
to whom honor is due.
For refutations of Behringers misguided claims about
homology and embryonic similarities, see Jonathan Wells rebuttals of
these icons of evolution.
Behringer seems to hope children watching oversimplified
PBS Evolution programs will be
sufficiently Darwinized early, before reading the truth about molecular
machines in the journal Cell as college biology majors. We
think they would be better inspired and better educated by watching
Unlocking the Mystery of Life.
Next headline on: The Cell and Biochemistry.
Next headline on: Intelligent Design.
Next amazing story.
First Life Had To Play It Cool 06/14/2002
Dr. Jeffrey Bada of the Scripps Institute of Oceanography, a prominent
astrobiologist, with a Mexican colleague, claims Some Like It Hot,
But Not the First Biomolecules. His article is in the
June
13 issue of Science. While arguing against hydrothermal
vents as likely places for life to self-organize, he scans the
gamut of current thinking on the origin of life, and highlights the many
problems that remain unsolved since Oparin first ventured a theory in
the 1930s. Some of the problems Bada mentions are:
- The formation of polymers from monomers is a thermodynamically
unfavorable process.
- Organic soup molecules needed to be concentrated and localized.
- DNA can only last 100,000 years.
- RNA is much more fragile than DNA, yet RNA-world scenarios are among todays top contenders.
- Proponents of non-RNA/DNA autocatalytic prebiotic reactions usually
prefer hydrothermal vents, but Various metabolic reaction schemes
have been proposed and investigated, but none have been demonstrated to
be autocatalytic. Nor are there any empirical indications that this is
even possible in a prebiotic context.
- High-temperature scenarios for peptides are unlikely: ... peptide
bonds are also rapidly hydrolyzed at elevated temperatures. The
steady-state concentration of peptides under hydrothermal conditions is
therefore problematic.
- But was it too cold? Because of the reduced luminosity of the
young Sun, Earth may indeed have been completely covered with ice during
its early history. Yet the needed reactions proceed much more
slowly in the cold.
- No future without accurate replication: But regardless of its
initial complexity, autocatalytic chemical-based metabolic life could
not have evolved in the absence of a genetic replication mechanism
ensuring the maintenance, stability, and diversification of its
components. In the absence of hereditary mechanisms, autotrophic
reaction chains would have come and gone without leaving any direct
descendants able to resurrect the process.
- Information is required somehow: Life as we know it consists of both
chemistry and information. If metabolic life existed on the early
Earth, converting it to life as we know it would have required the
emergence of some type of genetic information system.
- How did prebiotic life survive the battlefield: If the transition
from abiotic chemistry to the first biochemistry on the early Earth indeed
took place at low temperatures, it could
have occurred during cold, quiescent periods between large,
sterilizing impact events. But regardless of how the first life
arose, it may not have survived subsequent impacts.
In conclusion, Bada rules out hot or warm environments such as hydrothermal
vents. That leaves only cold or cool environments where reactions
would have been much slower, especially if the earth were icy. But
life needed to get a foothold, and somehow evolve an information system,
between meteorite bombardments. Maybe it happened, though, and
more than once:
Life may have originated several times before surface conditions
became tranquil enough for periods sufficiently long to permit the
survival and evolution of the first living entities...
These admissions are telling, coming from
a believer in chemical evolution. He does more to undermine the
plausibility of chemical evolution than support it.
Not a shred of evidence does he present; just hope against all
hope in a minefield of devastating problems.
Each one of these problems singlehandedly
falsifies chemical evolution, and he didnt even mention one of
the worst: the mystery of left-handed proteins.
His faith is stitched together with the words may and
could have, found
15 places in the brief article, but at least he is honest about
the problems. Its almost laughable at the end, though,
when after walking past all these insurmountable hurdles, and not offering
empirically plausible options, he speculates that the miracle
of life originating by itself might have happened not just once, but
multiple times! For the coup de grace, read the next
headline, below.
Next headline on: Origin of Life.
Cells DNA Translation Machinery Revealed in Unprecedented Detail 06/13/2002
Japanese scientists publishing in the
June
13 issue of Nature have revealed the molecular structure
of the RNA polymerase holoenzyme, including its initiation factor, at
2.3 angstrom resolution (an angstrom is one ten billionth of a meter).
This enzyme is one of the most important
molecular machines in the cell;
The DNA-dependent RNA polymerase (RNAP) is the principal enzyme of
the transcription process, and is a final target in many regulatory pathways
that control gene expression in all living organisms.
It builds all the RNA molecules: messenger RNA, transfer RNA, ribosomal RNA,
and others. Moreover,
the machine consists of five subunits that are evolutionarily
conserved in sequence, structure and function from bacteria to humans.
The color models show a complex structure shaped somewhat
like a lobster claw. It doesnt work until the initiator named
sigma (with four subunits itself), like a key, turns it on and attaches it
to a promoter on the DNA
molecule. Then it melts the DNA at that point and unwinds
the section of DNA to be transcribed, and releases the promoter.
At that point, the machine undergoes a significant change in shape, and crawls
along the strand, attaching RNA subunits into a chain.
Apparently, two precisely-placed magnesium ions at the active site
are essential for this catalytic activity.
During the operation, the DNA appears to run through the cleft of the claw,
the active site somewhat like a zipper, with a series of
alternating switch and trigger functions snapping together the ingredients
and preparing the machine to move to the next step.
To get a feel for how the machine works as it
moves along, here is their description, jargon and all:
Taken together, these structural data allow us to propose a possible
mechanism for RNAP translocation during RNA synthesis. At the
step of relaxation (after translocation, before the next
reaction), the template base at position i+1 is
paired with the substrate nucleoside triphosphate (NTP), the bridge
helix is in an all -helical conformation, the Arg 1,096 bridges the
i and i+2 DNA phosphates, and the flexible
trigger loop is distal (rather than proximal) to the bridge
-helix. After phosphodiester bond formation, a signal induces the
movement of the trigger loop towards the bridge -helix, pushing out the
switch residues. In their flipped-out conformation,
the switch residues may engage the DNA phosphate at position
i+1 and bring the bridge -helix under the DNA
backbone towards the i+2 nucleotide. During
this step, Arg 1,096 may also switch its interacting partner from DNA
phosphates to the side chain of an acidic (polar) switch residue, thus
simultaneously stabilizing the flipped-out conformation of the switch
residues and facilitating the translocation of the enzyme.
The above is a description of one step along the chain, which in real
life operates faster than a human hand can zip up a dress.
Update The August 7 issue of the journal
Structure
has additional details about RNA polymerase, with detailed
shaded models of how the DNA and RNA parts work their way through the
clefts and clamps of this machine into the active site where the actual
transcription occurs.
We are at an exciting time in scientific
discovery when the actual molecular machinery of the cell is coming into
focus with unprecedented detail. In some ways, this time is even
more exciting than 1676, when Leeuwenhoek
was astonished to find millions of microscopic animals living in a drop
of water. Now we can zoom in 1000%, and what
do we see? a factory of actual machines made out of molecules, performing
operations with a speed and efficiency unmatched by human engineering.
Remember that RNA polymerase does not act alone, but in concert with many
other machines, such as gatekeepers, which expose the DNA strand from its
carefully-guarded locked-up state, to proofreaders,
which follow up the operation with quality control, and linemen, that
provide disaster recovery all under the control of regulatory
factors. If Leeuwenhoek liked the sneak preview,
he should have seen the main show!
The authors note that this machinery is highly conserved
(i.e., identical, unevolved) between bacteria and humans (and by inference,
sharks, dinosaurs,
giant Sequoias, grass, butterflies and earthworms). It seems an
insult to call anything a lower form of life any more.
Yet evolutionists believe humans and all these creatures evolved from
bacteria, which evolved from simple molecules. As we have seen so
often, the authors of this paper merely assume evolution. Nowhere
in this paper do they explain how such a complex system came about.
The closest they come is to observe differences between a thermophile and
a bacterium, and then to dismissively state, This observation raises
the possibility that these structural segments have evolved from a
common ancestor. Their structural similarity and the presence of
HtH motifs suggest that the nonconserved ND1 region of [sigma, the
initiator] might have served as an alternative DNA-binding site at
some stage of evolution (emphasis added)
Thats it. No credible sequence of lucky accidents, each of
which would have had to merit survival value or
be eliminated, to explain how just a portion of the initiator element
of this system could have evolved; just an assumption that it did evolve
somehow, somewhere, somewhen.
Faith is too gentle a word for such credulity.
RNA polymerase is busily at work right now in your eyeball,
liver, heart, brain, leg muscle, little finger, and every one of the trillions
of cells in your body. The remarkable action of
this molecular machine is beautifully illustrated in the new film
Unlocking the Mystery of Life,
which we highly recommend. Seeing RNA polymerase in action,
in the context of a multitude of other complex machines coordinating
their actions in a symphony of manufacture, will make you
stand up and shout Glory!.
Next headline on: The Cell and Biochemistry.
Next amazing story.
Evolution 2002 Film Festival Planned 06/12/2002
The University
of Illinois at Urbana-Champaign has planned its Evolution 2002
conference for June 29 to July 2, with symposia, exhibits, public
outreach and a
film
festival.
SciNews
also talks about the conference.
One of the films being shown is the episode from
the 1941 Walt Disney classic Fantasia, the
Rite of Spring
piece that purports to give a coldly accurate
portrayal of the history of the earth. This, of course,
is a mindless, purposeless, undirected panorama of galaxies and stars
forming out of the void, an early earth pummeled by meteorites and
floods, life arising spontaneously and evolving upward to dinosaurs
battling in blood and gore and survival of the fittest, only to
perish from a drought (this was before the meteor impact theory).
Word has it that Stravinsky, the composer,
who
had become a Christian, was critical of this distortion of his work.
At one point early in the story,
the tableau descends into the ocean where living cells just
magically appear a classic example of the power of
visualization propaganda.
Thus Disney perpetuated the pervasive
myth of
spontaneous generation in spite of the work of
Leeuwenhoek
and Pasteur.
1941 puts Fantasia after Oparins first tentative theories on
chemical evolution, but before the heady days of
Miller and Fox (early 50's), and well before the discovery that cells
are factories of DNA-coded molecular machines.
Well, after all, this is Disney, where imagination is king.
Lets hope the organizers of Evolution 2002 point out the flaws in
Disneys coldly accurate portrayal of earth
history.
Fantasia is well named: by definition, a fantasia is
a work (as a poem or play) in which the authors fancy roves
unrestricted; something possessing grotesque, bizarre, or unreal
qualities. The Rite of Spring episode fits perfectly
with the dancing mushrooms, frolicking centaurs, waltzing hippos in
tutus and partying demons in the rest of the movie, and should be viewed
as such. If Evolution 2002 organizers think Fantasia
is good public outreach to present evolution, they need to move out of
Fantasyland and get back on Main Street.
Next headline on: Movies.
Mutant Bacteria Battle for the Fittest 06/11/2002
A team from the University of Southern California mutated some
bacteria by damaging combinations of their three transcription
genes (DNA polymerase). Then they put them in the boxing
ring to see which could outcompete each other. The mutants
had varying levels of success against each other, but none of them
could stand up to Mr. Wild-Type (the unmutated champ). Then,
they starved the mutant populations to see which ones could start
the GASP reaction (growth advantage in stationary phase), a
survival response that normally occurs after 99% of the population
dies. Some were able to GASP more or less than others.
In spite of the crippling by mutations, the authors believe that
a subset of the mutations may provide the mutational raw
material on which natural selection acts during the evolution of
bacterial populations. ... replication persists, under most conditions,
whether or not the mismatch repair system is functioning, allowing the
propagation of missense mutations. When the types of DNA lesions
that induce the repair polymerases are encountered, replication
often halts, with dire consequences for the cell. ... Given the
observation that all three SOS pols can perform in both an error-prone
or error-free manner, beyond the repair of DNA damage, these data
support a model in which these alternative DNA polymerase enzymes
are important for the generation of genetic diversity under normal
physiological conditions. The paper is published in the
June 11 online
preprints of the Proceedings of the National Academy of Sciences.
What? The data dont support
any such conclusion. In the first place, all the complex
transcription genes and enzymes already existed. In the second
place, none of the mutants showed any advantage over the wild type;
they were all clearly less fit and unable to compete. Imagine
a boxing ring with the heavyweight champion competing against five
physically disabled individuals. As long as the champion is
outside the ring, a winner may appear between the disabled ones, but
once the champion is in the ring, its no contest. Is this
scenario supposed to demonstrate evolution? These authors showed
no evidence that any new information, function, or ability arose by
random mutations. They only showed that existing capabilities,
even under stress, can sometimes limp along for awhile. Though
given a bluffing title and listed in the category Evolution, this paper
provides no support whatsoever that increased fitness can arise from
mutation. You wouldnt catch that if you just read the
title and the abstract; the vacuum is found in the body of the paper.
What the facts reveal is an already-existing complex system of
transcription and repair (the SOS response), that give
evidence of intelligent design and robustness.
Next headline on: Darwinism and Evolutionary Theory.
Article 06/11/2002: Darwin would
love this debate, claim Bruce Chapman and Stephen Meyer of
the Discovery Institute
in a short piece in the
Seattle
Times June 10, discuss results of the recent
Zogby Poll. On
WorldNetDaily
June 1, Benjamin Wiker, also of Discovery, asks, Is Science
Democratic?
Next headline on: Intelligent Design.
Do Protein Sequences Demonstrate Evolution? 06/11/2002
Three scientists writing in the
June 7 Journal
of Molecular Biology explore compensatory covariation
as a possible means to discern evolutionary trees in protein sequences.
Compensatory covariation is something like having pairs of charges that
need to match; if one switches from positive to negative, its partner must
switch from negative to positive for the pair to continue to match, or
else the protein might suffer a drastic change. The authors look
for signs of compensatory covariation among evolutionary trees but find
the signal weaker than expected: Even given these results, and
the evidence that the charge compensatory substitution signal can only
become stronger as the database grows, it remains inescapable that the
charge compensatory signal is weak, perhaps even weaker than expected.
What might be the scientific implications of this observation?
They explore some possibilities, including the controversial view that
functionally conserved proteins are scarce: controversial, because the
majority view is neutral evolution, that similar proteins can be
considered functionally identical. They conclude with hope their method
will be potentially useful in comparative genomics, although to this
point its results appear ambiguous. The paper is entitled,
Detecting Compensatory Covariation Signals in Protein Evolution Using
Reconstructed Ancestral Sequences, by Fukami-Kobayashi, Schreiber and
Benner.
As shown so often in these pages,
evolutionary reconstructions based on DNA and proteins are ambiguous and
equivocal. As usual, the authors end up hoping that more light will
be shed in the future. Its more
vaporware.
The title looks impressive, and a casual scan might make it appear this
is another paper with evidence for molecular evolution, but where is it?
Maybe this, maybe that, maybe something else the authors waffle on
why a clear family tree is not jumping out of the data. They make
this clear admission of the flaws and circular
reasoning in the software methods for constructing
evolutionary trees (emphasis added):
Getting the branching correct in an evolutionary tree is a difficult
problem. Part of the difficulty arises because of the trade-off between
the accuracy of the tree and the cost of generating it. ... Ancestral
sequences reconstructed by parsimony are well known to be sensitive to
incorrect branching topology. This is the principal error associated
with the choice of this inexpensive reconstruction tool.
More sophisticated methods, including maximum
likelihood methods, are
expected to provide better trees, at least given the first-order
stochastic [i.e., random] models. These are expected to generate
ancestral reconstructions that are more robust to errors in tree topology.
They are, however, more expensive.
Even the more expensive tools
do not guarantee a correct tree, of course. In practice, the
approximations made in the model (see Introduction) may create
systematic error larger than fluctuation error. To date, the only
way to benchmark a tree requires knowledge of the evolutionary history
of the sequences in question, or a reconstruction of a simulated
evolutionary process. The first is difficult to get for sequences
emerging from natural history. The second requires a mathematical
model for evolution, which is often the same one that is used to
construct the tree in the first place.
This is Finagles Rule #3
in action: Draw your curves, then plot your data. In
other words, they have to already know the evolutionary tree
they want to make sure the results of the computer simulation are
correct! They offer only hope that their method may
provide an independent check, but then the example they provide leads
to their observation that the signal is weaker than expected.
As we have seen often with scientific papers on evolution, the lack
of evidence, and the scrambling they do to explain it, is the most
interesting and revealing aspect of the paper. See the
May 28 entry for another example.
Next headline on: The Cell and Biochemistry.
Next headline on: Darwinism and Evolutionary Theory.
Permian Volcanism in Siberia Doubles 06/10/2002
Lava flows of Permian age a million cubic
kilometers in extent, twice as much as previously thought, cover much
of Siberia, an area twice the size of Europe and a million times larger
than the Kilauea rift on Hawaii. The paper in the
June 7
online issue of Science says this is the largest by volume
of all lava-flood deposits. Scientists are wondering if this
volcanic episode, occurring within a relatively short period of
time, might account for the mass extinction at the end of the
Permian, but
Nature Science
Update says, No one knows exactly how big these effects might
have been, or how they might have affected life on the planet.
There is clear evidence for
catastrophism in this report, illustrating further that
uniformitarianism is dead
(Lyells
hypothesis that did much to cause Darwin to doubt the Genesis record),
but the statements about mass extinction and dating are speculative,
based on evolutionary assumptions.
The potassium-argon and
argon-argon dating methods are unreliable for dating volcanic
deposits. This new find argues against the meteor
impact hypothesis for the Permian extinction, but is not the
only evidence for volcanic catastrophes. Other large flood-lava
deposits are found around the world, in the Snake River plain of Idaho,
the Columbia River basin of Oregon, and the Deccan traps in India,
for example. In addition, there have been huge explosive eruptions
at Yellowstone and Long Valley Caldera in California that covered vast areas
of North America with volcanic ash. These episodes, larger than
anything known in human history, and their relic remains indicate that
worldwide volcanism
has been on the decline, consistent with a flood model within
biblical chronology. The Bible clearly states that all the
fountains
of the great deep burst forth on one day, causing a
mass extinction of all life on earth
except for those
on the ark. This account of the extinction is not based on
circumstantial evidence, like the
evolutionists story (that keeps changing), but on
the Word
of God.
Next headline on: Geology.
No Clear Pattern Found in Leaf Evolution 06/07/2002
A team of biologists writing in the
June 7
online issue of Science
compared genes that control leaf development in a plants and
did not find a clear evolutionary pattern. They found that
a gene called KNOX1 is down-regulated at the start of complex
leaf formation; However, complex primordia may mature into
simple leaves. Therefore, not all simple leaves develop
similarly, and final leaf morphology may not be an adequate
predictor of homology. They explain:
Phylogenetic analyses of leaf evolution (Fig. 2) reveal that the
ancestral angiosperm had simple leaves (19, 20), and that complex
leaves repeatedly arose from these simple-leaved ancestors (on average
29 "gains") and reverted (on average six "losses") to the ancestral
simple form. ... This indicates that
neither all simple nor all complex leaves are homologous [similar owing
to common ancestry (21)]. Complex leaves are generally assumed to
be nonhomologous (22), but simple leaves are generally assumed to be
homologous and, therefore, developmentally similar. Our
observations in Lepidium suggest that the latter assumption may not
always be correct.
They noted that ferns have complex leaves that do not down-regulate
the KNOX1 gene, and a similar developmental pattern is found in certain
legumes, including peas.
As we have seen so often, there is no clear
evolutionary pattern in the genes. The variety of leaf shapes
and sizes in the plant
kingdom is phenomenal. Molecular biologists long hoped that the
genes would tell the family history, but as we have seen often, the
picture is confused. The authors admit that complex leaves
appear to have evolved 29 times and devolved back to simple leaves
six times, and thats just from studying one set of genes at
one stage in leaf development. Remember also that the origin
of flowering plants was Darwins abominable mystery
that remains unsolved (see our headlines on
May 3 and
Jan. 30 and
Apr 3, 2001 on this topic).
Observers throughout history have noticed similar structures in
living things (homology) adapted for different purposes.
Darwinists attributed these similarities to common ancestry.
Unfortunately for them, the ancestral pattern they hoped to find
in the genes has proved equivocal. For background on
problems with the homology argument for evolution, see this article
by Jonathan Wells and Paul Nelson,
Homology:
A Concept in Crisis.
Next headline on: Plants.
Next headline on: Darwinism and Evolutionary Theory.
Human Language Evolves by Natural Selection 06/06/2002
A trio of scientists writing in the
June 6 Nature
believes language should be included in evolutionary theory:
Language is our legacy. It is the main evolutionary contribution
of humans, and perhaps the most interesting trait that has emerged in
the past 500 million years. Understanding how darwinian evolution
gives rise to human language requires the integration of formal
language theory, learning theory and evolutionary dynamics.
Formal language theory provides a mathematical description of language
and grammar. Learning theory formalizes the task of language
acquisition-it can be shown that no procedure can learn an unrestricted
set of languages. Universal grammar specifies the restricted set
of languages learnable by the human brain. Evolutionary dynamics
can be formulated to describe the cultural evolution of language and
the biological evolution of universal grammar.
They feel the same evolutionary rules can be applied to language as to
biology, because DNA is also a language:
Biology uses generative systems. Genomes consist of an alphabet
of four nucleotides, which, together with certain rules for how to
produce proteins and organize cells, generates an unlimited variety of
living organisms. For more than 3 billion years, evolution of
life on Earth was restricted to using this generative system.
Only very recently another generative system emerged, which led to a
new mode of evolution. This other system is human language.
It enables us to transfer unlimited non-genetic information among
individuals, and it gives rise to cultural evolution.
They propose a multidisciplinary approach to human language
to study language as a biological phenomenon, as a product of
evolution. After discussing things like Noam Chomskys
theory of universal grammar (UG), and exploring aspects of language from
these various approaches, they list several unanswered questions about
human language, and to answer them, propose combining all approaches under
the aegis of evolution: The study of language as a biological
phenomenon will bring together people from many disciplines
including linguistics, cognitive science, psychology, genetics, animal
behaviour, evolutionary biology, neurobiology and computer science.
Fortunately we have language to talk to each other.
This is evolutionism run amok.
Applying mutation and natural selection to abstract concepts like
language is out of line, in spite of their impressive-looking
differential equations and bluffing terminology. Words and
semantics of human speech are not carried in the germ line, nor are
they going to by mutated by cosmic rays. But these authors
stretch mutation and natural selection of universal grammar into
abstractions that take on a life of their own. This is crazy; its
like applying quantum theory to a Lakers game and explaining missed
shots by the uncertainty principle (worse, because natural selection
is a vacuous concept, unlike quantum theory). You cant do
this to language. Where are the Darwinist umpires calling foul?
Why does Nature publish illegal procedure?
This kind of thinking
comes from reductionist materialism that cannot handle ideas as
being fundamentally different from matter. Language is conveyed
by means of matter, via physical organs like vocal cords and brains, but
it is non-material, and as such, cannot be expressed in terms of
genetic mutations and natural selection. They dont seem to
realize, also, that their premise shoots
itself in the foot; if language is a product of undirected natural
forces, then meaning has no ultimate validity, therefore this
paper is meaningless as well. Fortunately we have language to
talk to each other, they say, but from an evolutionary point
of view, talk is not only cheap, its worthless.
Look at two examples of these authors becoming intoxicated on Dar-wine:
- The basic approach is similar to evolutionary game theory.
[We have dealt with the fallacy of game theory
elsewhere.]
There is a population of individuals. [Agreed.]
Each individual uses a particular language. [OK so far.]
Individuals talk to each other. [Were learning a lot
here.] Successful communication results in a pay-off that
contributes to fitness. [Come again?
Who pays whom with words that are worthless, and who decides what is fit?]
Remember, they are seeing these concepts in biological terms; the
minds and personalities and ideas of the speakers are illusions. They
view humanness, with all its richness of relationship and communication,
as just a product of materialistic selection. Think about that the
next time you talk to someone.
- Creolization is the formation of a new language by children
receiving mixed input. So instead of seeing bad grammar
as a symptom of bad education, they see speaking Creole as the fodder for
evolutionary progress. Maybe in the cave Dad said Grog! but
Mom said Ugh!, so Junior says Grugh! and
in a few hundred thousand years we have the Iliad.
So dont correct your kid; shes evolving.
Are these the same people who gave us Ebonics? Do you want your
high school grad going to college to study under professors who are so
evolution-minded they teach that mutated speech is a good thing, and teach
the humanities as games being played by selfish memes?
(Meme: an idea, behavior, style, or usage that spreads
from person to person within a culture, evolving by natural selection.)
Try this science project: translate their paper into
pig latin, jive, redneck* or
moron and see if it evolves into improved communication.
In spite of their bluffing that evolution will provide the ultimate
theory of language, look at the unanswered questions in their conclusion:
Some theoretical questions are: what is the interplay between the
biological evolution of UG and the cultural evolution of language?
What is the mechanism for adaptation among the various languages generated
by a given UG? ...
Some empirical questions are: what is the actual language learning
algorithm used by humans? What are the restrictions imposed by UG?
Can we identify genes that are crucial for linguistic or other cognitive
functions? What can we say about the evolution of those genes?
These questions reveal that their evolutionary approach is nothing but
vaporware.
Reality check time. What do the observations show?
A vast gap between
ape and human communication.
Human language that is highly developed from the start;
the cultures considered primitive sometimes have the most complex
verbs and grammars. Civilizations that are already using
language, bookkeeping, and contracts from earliest times (look at this
June 1
story from Syria for instance). This is the real world, folks.
Dont blame your bad grammar on beneficial mutations, or excuse
your thoughts as artifacts of evolving memes. We are
personally
responsible for our thoughts, and
words mean things.
Communication did not evolve;
in the beginning was the Word.
* Heres the results of our in silico science
project. We translated the first paragraph of their paper
into redneck.
See if the communication is evolving....
Langage is our leg, uh see. It is th main evolushunry
corntribushun of hoomins, an perhaps the dawgoned-est
interestin trait thet has emerged in th past 500 millon
yars. Unnerstanin how darwinian evolushun gives raz
thoomin langage requires the integrashun of fomal langage
theoy, larnin theoy an evolushun-airy
dahnamics. Fomal langage theoy provahds a madematical
dexcripshun of langage an grammah. Larnin theoy
fomalizes th tax of langage acquisishunit kin be
shown thet no procedure kin larn an unrestricked set o langages.
Unyversal grammar specifaz th restricked set of langages
larnable by th hoomin brain, as enny fool kin plainly see.
Evolushunry dahnamics kin be fomulated tdexcribe th
culchul evolushun o langage an th biological evolushun o
unyversal grammah, ah reckon.
For our second input, we translate it into Cockney:
Am sandwich is us legacy. It is the bloody main evolutionary
contribution of umans, right, and peraps the most
interestin trait that as emerged in the past 500 million
years. Understandin ow darwinian evolution gives rise
ter human am sandwich requires the integration of formal am
sandwich theory, learnin theory and evolutionary
dynamics. Formal am sandwich theory provides a maffematical
description of am sandwich and grammar. Learnin theory
formalizes the chuffin task of am sandwich acquisition-it
can be shown that no procedure can learn an unrestricted set of
am sandwichs. Universal grammar specifies the chuffin
restricted set of am sandwichs learnable by the human Michael
Caine. Evolutionary dynamics can be formulated ter describe the
bleedin cultural evolution of am sandwich and the
biological evolution of universal grammar.
Finally, we Creolize the two, to see if these mixed inputs yield an
improvement in communication:
Am sanwich is us legacy It is th bloody main
evolushunary corntribushun of umans, right, an peraps the
most interestin trait thet as emerged in th past 500
million years Unnerstanin ow darwinian
evolushun gives rise ter hoomin am sanwich requires
th integrashun of fomal am sanwich theoy,
larnin theoy an evolushunary dynamics
Fomal am sanwich theoy provides a maffematical
dexcripshun of am sanwich an grammar
Larnin theoy fomalizes th chuffin tax of
am sanwich acquisishun-it kin be shown thet no procedure
kin larn an unrestricked set of am sanwichs Unyversal
grammar specifies the chuffin restricked set of am
sanwichs larnable by th hoomin Ichabod Caine
Evolushunary dynamics kin be fomulated ter dexcribe th
bleedin cultura evolushun of am sanwich an
th biological evolushun of unyversal grammar.
Conclusion: communication subjected to mutation appears to obey the
Second Law of Thermodynamics.
Next headline on: Darwinism and Evolutionary Theory.
Next dumb story.
Fossil Diversity Tied to CO2 Levels 06/05/2002
Three American biologists claim to have found a statistically significant
correlation between the diversification of marine organisms and levels
of carbon dioxide in the earths atmosphere. The more CO2,
the more new species arose, they say. The paper is in the
June 4 online
preprints of the Proceedings of the National Academy of Sciences,
titled, Documenting a significant relationship between macroevolutionary
origination rates and Phanerozoic pCO2 levels.
Both data sources are dated on the
assumption of evolution, so they are correlating two
circular arguments together,
and they pretty much admit it: Conceivably there
are similar systematic biases in the two databases. We
propose, however, hypotheses linking macroevolution and
paleoenvironment. Thus, they choose the category of
explanation that fits their evolutionary bias.
This is the same kind of reasoning that
correlates sunspots to the stock market. But their theory generates
more questions than answers. Why would more species
originate because of more carbon dioxide? They fail to support any
plausible theory, other than to speculate out of thin air, why more
carbon dioxide would lead to more macroevolution. And since
Global warming is often associated with high CO2 levels,
and the two most extensive and long-lasting glaciations during the
Phanerozoic occurred at times of low CO2 levels, maybe global
warming is a good thing, because it increases biodiversity.
So down with the Kyoto treaty! And stop blaming humans for global
warming, because it happened naturally in cycles over millions of
years. Are these the conclusions the authors want drawn from
their paper? Doubt it.
Next headline on: Fossils.
Next headline on: Darwinism and Evolutionary Theory.
Next dumb story.
Model of Tooth Evolution Lacks Bite 06/04/2002
A pair of biologists publishing in the
June 4 online preprints of the
Proceedings of the National Academy of Sciences proposes a model for the
evolution of mammal teeth, focusing on teeth because they are good subjects for comparative
anatomy in living animals and fossils. They produced a mathematical formula that incorporates
known gene families, including activators and inhibitors of cell growth, that could
predict, by tweaking the parameters slightly, the known cusp patterns on molars of a
mouse and a vole. Calling their
model morphodynamic, they feel that the actual shape of the developing tooth
has a causal role in patterning, and that Large morphological effects
frequently can be achieved by small changes. They admit, however, that modeling
the phenotype (outward appearance) from the genotype (DNA) is challenging. Nevertheless,
they feel they have shown a potentially fruitful approach to modeling other things like the
face, brain, feathers, limbs and various branching organs, where large effects may not
require extensive genetic changes. As they succinctly summarize their view,
shape during development matters.
We struggled hard to give these scientists the benefit of
the doubt that this is not a Lamarckian model based on circular reasoning, as it first
appeared. You have
to respect anyone who gets into the nitty gritty details and really tries to come up with
a rigorous model of how evolution works, and tries to check it against
both genetics, embryology and the fossil record. However, this paper fails to support
evolutionary theory at all, we feel, for the following reasons:
- Initial Conditions. They started with a fully-operational gene network of the 50
known genes involved in tooth development, and with fully-operational activator and
inhibitor enzymes, epithelial and mesenchymal cells, and the works. How could such
a complex, interacting system ever evolve?
- Oversimplification. Their model was tested only against one molar tooth on just
two rodents. They only explored the developmental stages before mineralization occurs.
They focused on one tiny part to the exclusion of more serious evolutionary challenges, like
the root, dentine, enamel, and organization of all the teeth in the jaw, the brains to
operate the teeth, and a host of other interconnected phenomena that need explaining.
They excluded many other factors, genetic and environmental, that might influence the outcome.
They admit that the large number of expressed genes in developing teeth may be needed
to mediate the basic gene network interactions in individual molecular cascades ... or affect
the basic parameters of the network to fine-tune and buffer development. We therefore
propose that although gene networks regulating development seem highly complex, the
underlying principles of the network organization may be relatively simple. Thus they
sweep immensely complex challenges under the rug.
- Microevolution. Their model only deals with cusp patterns on a molar. A
mouse could have a slightly different cusp pattern and still be a mouse. Therefore,
this model has little to do with speciation or evolution in the Darwinian sense.
- Adaptation. They fail to explain how teeth become adapted to provide the animal
a benefit large enough to aid survival and be propagated. Their model says nothing
about the adaptive value of pattern differences. It could be argued that this is a
paper about reverse engineering, not evolution.
- Lamarckism. They fail to show how patterns, once established, would be propagated
in the germ line. This makes it another theory of inheritance of acquired characteristics,
long discredited in evolutionary circles.
- Teleology. They claim that the shape of the developing tooth has a causal role
in its patterning, yet the pattern is important for function. If it were a purposeless
cause, why would it produce function? Why would it produce the observed variety of teeth:
incisors, molars, bicuspids, walrus tusks, beaver gnawing teeth, and thousands more specialized
teeth, all perfectly adapted?
- Circular Reasoning. They assume evolution rather
than prove it. Evolution is spoken of as an already given fact, even though details
are challenging and their own model lacks an actual mechanism for
producing adaptive function from undirected natural forces.
- Bluffing. In their abstract, they say our
model predicts the course of tooth-shape development in different mammalian species and also
reproduces key transitions in evolution. It does no such thing.
- Extrapolation. In spite of all the above weaknesses,
they feel they have hit on an idea that could explain feathers, brains, limbs, and the whole of
animal diversity a belief unjustified by the data they present.
- Narrow Mindedness. They fail to consider alternatives, like design.
Here at Creation-Evolution Headlines, we hunt for the nuts and bolts of evolutionary
theory as written in the scientific journals, not just the popularizations. The peer
review process should be catching these weaknesses; instead, unsupportable theorizing passes
review, simply because it is mechanistic. Evolutionists feel that evolution is such
an established fact, and that naturalism equals science, that any explanation that invokes
only natural causes is permissible, even
if it has severe weaknesses (the Best-In-Field Fallacy).
And they feel it is perfectly all right to theorize about one tiny aspect of evolution, like the
shape of cusps on a molar tooth, even if the model is oversimplified and has problems, as long as it could
plausibly fit into the big picture of evolution somehow. But every step has problems!
The whole evolutionary edifice is a house of cards like this paper follow our Darwin
chain links and see for yourself if anything they claim is solid, observable, testable
science. It doesnt have to be, you see, because they already know
in their heart that it is true. The question-begging in the
evolutionary mindset is so entrenched, it seems hopeless to ever get rational scientists to
see their own illogic. This is a good time to read the quote by Dr. Standish
at the top of this page.
Next headline on: Mammals.
Next headline on: Darwinism and Evolutionary Theory..
National Geographic Considers Flood Myths Worth Investigating 06/04/2002
New finds worldwide support flood myths, says a news
report on the
National
Geographic website. The article talks about widely-separated
instances of sunken cities, one off the coast of Cuba, and one in India,
apparently tied to local legends of large floods sent by angry gods.
Scientists, historians, and archaeologists
view many of these enduring tales as myth, legend, or allegoric tales
meant to illustrate moral principles. Recent findings indicate that
at least a few of them could be based on real floods that caused destruction
on an enormous scale, writes Brian Handwerk for NG News.
The Cuban structures are underwater as deep as 2500 feet. The
Indian site covers several square miles off the coast. Explorer Graham
Handcocks initial reaction was disbelief: I have argued for
many years that the worlds flood myths deserve to be taken
seriouslya view that most Western academics reject. But here in
Mahabalipuram we have proved the myths right and the academics wrong.
These two finds are more recent than
Noahs flood, but Hancocks last comment deserves reflection.
Next headline on: Geology.
Cosmic Law of Everything Far From Consensus 06/04/2002
The July Astronomy
Magazine is on newsstands (they come out early, you know), and
editor Bonnie Bilyeu Gordon laments the fact that every time they
feature a story on cosmology or theoretical astrophysics, they get
a lot of mail, some of which question the evidence for such
things as string theory, membrane theory, supersymmetry, inflation,
even the Big Bang. We dont blame you for being confused
or challenged by such ideas; the evidence for many of these subjects
is not always easy to understand. And all of the theories
change as they develop. She describes her attendance at
a recent conference on Science and the Ultimate Reality
at Princeton (March 15-18), in which Every accepted point of
view was represented, and many of the speakers contradicted one
another. At times these astrophysicists got cranky with one
another. She explains that even the editors of
Astronomy sometimes squabble over the validity of a
cosmology story (and other things) so its no surprise
that readers have lots of questions.
The cover story on
dark energy, Moving Right Along: The accelerating universe
holds secrets to dark energy, the Big Bang, and the ultimate beauty
of nature by Mario Livio, lives up to the confusion, presenting
several highly speculative and contradictory theories, and asking
Are we facing a breakdown of some of our most cherished
theories of the universe? But the article
contains a sidebar Is There Beauty in Nature? on p. 38
with this quote by Kepler: Geometry, which before the origin
of things was coeternal with the divine mind, supplied God with
patterns for the creation of the world.
Notice that secular cosmologists are not
converging on a theory of everything. The observations that
led to a theory of dark energy a few years ago were totally unexpected,
for instance, and simplistic explanations of the Big Bang have to face
nasty details that get in the way like the lumpiness and flatness and
entropy problems, to say nothing of philosophical
criticisms about imagining multiple universes or creating everything
out of a quantum fluctuation. If the worlds brainiest
cosmologists contradict one another and get cranky with each other,
should we mere mortals just meekly accept their stories?
Maybe their whole approach is wrong, forcing the Copernican principle far
beyond Copernicus, degrading the place of man in the scheme of
things, and assuming that beautiful architecture is capable of building
itself out of nothing. The Greek word cosmos, remember, means
beautiful, orderly design. Made perfect sense to
Kepler that there was a Designer behind it.
Next headline on: Cosmology.
The Universe Is a Giant Computer 06/03/2002
Seth Lloyd, a Cambridge physicist writing in the
June 10
Physical Review Letters has imagined the universe being like
a giant computer. Treating each change in quantum states as a
kind of calculation, he figured it has the capacity to have performed
10120 operations on 1090 bits.
Nature Science
Update asks if this is computing, what is the problem it is trying
to solve? What, then, is the Universe computing? Its
own dynamical evolution, says Lloyd. As the computation proceeds,
reality unfolds.
Pantheism. A
flawed analogy based on the
fallacy of personification.
Actually, this paper supports belief in a computer-Maker.
Assume that the computer-universe runs through all possible computations
without an intelligent Programmer directing it. James F.
Coppedge in Evolution: Possible or Impossible?
estimated the chance of getting a single protein molecule by chance, under
ideal conditions (with generous concessions to make it easier to succeed),
at 1 in 10161.
If there are only 10120 operations possible in our computer-universe,
you would need ten thousand billion trillion quadrillion computer-universes to
expect to get one lucky protein by chance. And such a protein would not be
alive; next, you have to keep running the program in 10119850 more
computer-universes to get 238 additional proteins to work with it, then worry
about the DNA code, etc. etc.
Now, if you were stuck in one of these computer-universes that didnt
succeed (and you are an atheist), you might
want to call Tech Support but nobody would ever answer.
Next dumb story.
(Hint: This computer-universe is infected and beyond repair.
Get the upgrade.