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a hammerhead shark
video

Shark Fin Genetics

 Dr. Demian Chapman of the Institute for Ocean Conservation Science at New York’s...
Mon, 10/18/2010 - 16:27
Screenshot of "Rethink the Shark" showing people on a beach.
video

Rethink the Shark

 Sharks have a long and impressive lineage.  Ancient sharks were cruising the...
Fri, 12/18/2009 - 14:17
Color illustration of an ancient bivalve.
Photo

Elevator Rudists

 These "elevator" rudists, an ancient bivalve, used one long heavy valve to anchor...