“Spying on Earth’s Most Awesome Creatures” –Scientists Pursue Undiscovered Species of Whales Swimming Below Since the Eocene

 

“Once upon a time—in the Eocene epoch—whales were quadrupeds. They walked on land. One primitive cetacean ancestor, Pakicetus, is thought to have been a canine-size, shore-living creature with a doggy tail and clawed paws. It probably had fur (hair typically fails to fossilize, so on this point there is debate). With its tiny, wide-set eyes, Pakicetus displays a sheepish expression in many artists’ depictions—as if ashamed at having gone extinct.”

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