Posted on July 17th, 2010 by by Kathy Gifford

According to Darwin, new species arise by gradual accumulation of incremental changes over long periods of time. That’s evolution in a nutshell. Can Darwin’s hypothesis be tested? To find out, we turn to the only real evidence we have of prehistoric life, our bone and shell guide to the past – the fossil record.
Tags: Darwinian Evolution David M Raup Fossil Record Niles Eldridge Stephen J. Gould
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