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Ice divers use a quadrat to study the density of creatures living on the underside...
Diving Beneath the Ice
The world beneath the Arctic ice is magical, but cold. Divers have to tolerate...
Studying Giant Squid
Smithsonian Zoologist Dr. Clyde Roper (rear) and museum specialist Mike Sweeney...
Dr. Clyde Roper prepares to dive thousands of feet to a giant squid habitat off the...