All in the Hips: Fossilized Discovery Leads Paleontologist to Find Early Whales Used Back Legs for Swimming

(PhysOrg.com) -- The crashing of the enormous fluked tail on the surface of the ocean is a “calling card” of modern whales. Living whales have no back legs, and their front legs take the form of flippers that allow them to steer. Their special tails provide the powerful thrust necessary to move their huge bulk.

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