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These "elevator" rudists, an ancient bivalve, used one long heavy valve to anchor...
Where ocean currents were strong, ancient rudist “recliners” lay unattached on...
Rudist clams are mollusks that went extinct about 65 million years ago. They were...
Curasub Sets Off
The Curasub departs for a deep sea dive, up to 1,000 feet off the island of...
Inside the Submarine
Smithsonian zoologists inside the Curasub, a 5-person submersible. They're...