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Color illustration of an ancient bivalve.
slideshow

Rudist Reefs

 About 100 million years ago, during the heyday of the dinosaurs, reefs were built...
Fri, 12/04/2009 - 14:25
A team of scientists explore the Arctic ocean.
slideshow

Under Arctic Ice

 Hidden beneath Arctic ice is a world few have ever seen. Take the icy plunge with a...
Tue, 01/04/2011 - 14:48
a ship in an icy landscape
video

Arctic Exploration

 New technology is making it possible for scientists to go where they’ve never...
Fri, 01/14/2011 - 13:45
Color illustration of an ancient bivalve.
Photo

Elevator Rudists

 These "elevator" rudists, an ancient bivalve, used one long heavy valve to anchor...
Notice the pink tentacles, which “recliners” used to filter feed.
Photo

Recliner Rudists

 Where ocean currents were strong, ancient rudist “recliners” lay unattached on...
Rudist clams are mollusks that went extinct about 65 million years ago.
Photo

Rudist Clams

 Rudist clams are mollusks that went extinct about 65 million years ago. They were...
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