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4 posts tagged with biology by saulgoodman.
Displaying 1 through 4 of 4.

Evolution: Maybe It's Not Just for the Fittest Anymore

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]
posted by saulgoodman on Mar 28, 2013 - 51 comments

We Have Met the Aliens and They Is Us

The Cosmic Womb: Recently published findings from researchers with the Imperial College London’s Department of Earth Science and Engineering seem to bolster the case for extra-terrestrial sources for the origins of life on Earth. (A PDF of the published results can be downloaded here, if you want the technical specifics.) [more inside]
posted by saulgoodman on Jun 13, 2008 - 27 comments

"Big Bird says it's time to wake up..."

A new round of genetic tests has confirmed it: The 'big lizards' of our childhood fantasies were more likely 'big birds.' In fact, they probably even had feathers, and looked more like this than this. Mind blowing, I know, but I guess this demonstrates that, despite what some may think, science really doesn't have a problem admitting that it got something wrong when new evidence comes to light.
posted by saulgoodman on Apr 24, 2008 - 75 comments

A red rain's a-gonna fall...

The latest on the so-called "Red Rain of Kerala." The authors of this study suggest the mysterious red biological material provides evidence of Panspermia. The BBC offers this updated look at the topic. (Previously discussed here on MeFi.)
posted by saulgoodman on Nov 14, 2006 - 15 comments

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