California's Sharks — Past and Present

9/13/2005; 57 minutes

California has an incredibly diverse shark fauna, representing a combination of ancient taxa and recently-evolved species. This state has perhaps the most complete and continuous fossil record of sharks anywhere in the world. Douglas Long of California Academy of Sciences explains how the present-day shark fauna formed, by looking at both the fossil record and major changes in climate and geography, and how several species co-evolved with other marine organisms. (#9524)

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