Lecture 19 - The Fossil Record and Life's History
recorded by: Yale University
published: April 17, 2010, recorded: February 2009, views: 2943
released under terms of: Creative Commons Attribution No Derivatives (CC-BY-ND)
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The fossil record holds a lot of evolutionary information that can't be seen on shorter time scales, although the more recent fossil record is more complete. Among other things, the fossil record demonstrates that extinctions can open up ecological space for new speciation and radiation, and that life forms tend to begin small and evolve to be bigger over time.
Stearns, Stephen C. and Rolf Hoekstra. Evolution: An Introduction, chapter 17
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