Is it time to put natural selection in its place?
Jello Biafra once famously wrote that "If evolution is outlawed, only outlaws will evolve.
" But while it likely comes as no surprise to specialists working in the field or to those who've been following developments in evolutionary biology closely, there's an emerging view among experts that Darwin's view of natural selection as the primary driver of speciation and evolutionary change may be incorrect or at least drastically overstated. It's long been understood that non-adaptive evolutionary mechanisms like "genetic drift
" and random mutation also play non-trivial roles in evolutionary processes, but a recent study
(link to abstract with full-text PDF available) casts new doubts on the primary role of natural selection, finding that "Neutral models, in which genetic change arises through random variation without fitness differences have proven remarkably successful in describing observed patterns of biodiversity." [more inside]
Even though you've heard of Darwin, it's quite possible that you're not familiar with Alfred Russel Wallace
), co-discoverer of the theory of evolution (a shame; in many respects he's the more interesting of the two!). Fortunately you can now learn more about the man through transcripts and scans of his letters with family and colleagues, which the UK Natural History Museum have just published online
. [more inside]
Cosmos: A Personal Voyage
is a thirteen-part television series of one hour shows written by Carl Sagan
, Ann Druyan
, and Steven Soter
, that was aired at the tail end of 1980 and was - at the time - the most widely watched series in the history of American public television. It is best introduced by an audio excerpt of one of his books, The Pale Blue Dot
. Inside is a complete annotated collection of the series. [more inside]
Steven Pinker on the "False Allure of Group Selection
", with comments by Daniel Dannett, Stewart Brand, and others. Richard Dawkins's take
on group selection. Jerry Coyne's take
One of the classic arguments against evolution by natural selection is
good is half an X?"
where X is an eye, a wing or some other complex
body part or system. Directly responding to the implicit challenge some researchers
not just figuring out how X could have
, but actually evolving
). The basic ideas
simple that web
) have been popping
The "blind watchmaker" may not be as blind as we thought.
A team of scientists at Princeton University discovers
that organisms are not only evolving, they're evolving to evolve better
, using a set of proteins to "steer the process of evolution toward improved fitness" by making tiny course corrections.
In the 1980s, Richard Lenski
hypothesized that his research team should be able to watch random mutations and natural selection taking place in a lab by observing a bacteria population over many generations. In 1988, beginning with a single bacterium, he started several replicate colonies. Recently, after 33,127 generations, his team has observed natural selection
Rutgers professor of philosophy Jerry Fodor created a bit of a stir
last October when he wrote an article for the London Review of Books arguing that natural selection may not be such a great theory after all, and that a "major revision of evolutionary theory... is in the offing." Not many fellow philosophers and academics agree
, it seems. Fodor responds to his critics here
. Six months later, it's still not entirely clear whether his argument is, as Justin E.H. Smith put it
, "irresponsible and stupid or so subtle that none of his adversaries, defending a status quo interpretation of the theory of natural selection, have been able to get it yet."
Natural selection and evolution in clocks
(youtube) - Video of the details and results of a program written to model the evolution of clocks (if they were alive). [more inside]
...Today we live in a less barbaric age,[than the age of Copernicus and Bruno] but an otherwise comparable disjunction between science and religion, the one born of Darwinism, still roils the public mind. Why does such intense and pervasive resistance to evolution continue 150 years after the publication of The Origin of Species, and in the teeth of the overwhelming accumulated evidence favoring it? The answer is simply that the Darwinian revolution, even more than the Copernican revolution, challenges the prehistoric and still-regnant self-image of humanity. Evolution by natural selection, to be as concise as possible, has changed everything...
Evolutionary biologist Paul Ewald
, author of The evolution of infectious disease
and an expert on the development of pathogen virulence (see this
for a good intro), responds to this editorial
in Scientific American
and pours cold water
on fears of pandemic influenza.