Hippo ancestry disputed: Researchers rebut family tree involving hippos, whales and pigs

Hippos spend lots of time in the water and now it turns out (or researchers argue), they are the closest living relative to whales. It also turns out, the two are swimming in a bit of controversy.

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<p><a href="http://www.physorg.com/news156605855.html">Hippo ancestry disputed: Researchers rebut family tree involving hippos, whales and pigs</a></p> <p>Hippos spend lots of time in the water and now it turns out (or researchers argue), they are the closest living relative to whales. It also turns out, the two are swimming in a bit of controversy.</p>