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Early Whales Used Well Developed Back Legs Thursday, September 18, 2008 - Ehud Rattner Home >> Headlines >> Biology   
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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. Yet this has not always been the case. (source: vertpaleo.org)
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