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What underwater phenomenon did Cousteau claim existed in'The Silent World'?
Mermaids
The Lost City of Atlantis
Echolocation abilities of porpoises
Water-breathing humans
Answer
The French explorer Jacques Cousteau first claimed in his book "The Silent World" that porpoises have the ability to echolocate, a claim that was not accepted by many scientists at the time. However, recent studies have shown that porpoises do indeed have this ability, and it is thought to be a key part of their hunting strategy.
The Deep Dive: Exploring the Legacy of Jacques Cousteau
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