21 NOV 2017 by ideonexus

 Evolutionary History Through Macro and Micro Observations

Everything in the cosmos has a history. The old dichotomy between the "historical" sciences (like geology, paleontology and evolutionary biology) and the (for want of a better term) "functional" sciences (like physics and chemistry—some would call them the "real sciences") was always supposed to be that fields like physics study dynamic processes and discover immutable laws of interaction among particles composing the cosmos—while the historical sciences study, well, history—the suppose...
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20 SEP 2011 by ideonexus

 Evolution in the Laboratory Occurs Very Quickly

One approach is to compare the rates of evolution in the fossil record with those seen in laboratory experiments that used artificial selection, or with historical data on evolutionary change that occurred when species colonized new habitats in historical times. If evolution in the fossil record were much faster than in laboratory experiments or colonization events—both of which involve very strong selection—we might need to rethink whether selection could explain changes in fossils. But ...
Folksonomies: evolution experimentation
Folksonomies: evolution experimentation
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So quickly in fact that scientists could turn an elephant into a mouse in just 10,000 years.

16 SEP 2011 by ideonexus

 Evolution Remodels the Old into New

...evolutionary change, even of a major sort, nearly always involves remodeling the old into the new. The legs of land animals are variations on the stout limbs of ancestral fish. The tiny middle ear bones of mammals are remodeled jawbones of their reptilian ancestors. The wings of birds were fashioned from the legs of dinosaurs. And whales are stretched-out land animals whose forelimbs have become paddles and whose nostrils have moved atop their head.
Folksonomies: evolution kluge
Folksonomies: evolution kluge
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Evolution modifies existing structures rather than creating new ones from scratch.

09 JAN 2011 by ideonexus

 Campbell's Rule of Design Through Evolution

We should think of it like this - evolutionary theory describes how design is created by the competition between replicators. Genes are one example of a replicator and memes another. The general theory of evolution must apply to both of them, but the specific details of how each replicator works may be quite different. This relationship was clearly seen by the the American psychologist Donald Campbell (1960, 1965) long before the idea of memes was invented. He argued that organic evolution, ...
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Natural selection doesn't just apply to biological designs, but exists on molecular and memetic levels as well.