ANN ARBOR --- Partial skeletons of ancient whales found in Pakistan last year resolve a longstanding controversy over the origin of whales, confirming that the giant sea creatures evolved from early ancestors of sheep, deer and hippopotami and suggesting that hippos may be the closest living relatives of whales. The new finds, reported in the Sept. 21 issue of the journal Science, are the first and only specimens known that combine sheep-like ankle bones and archaic whale skull bones in the very same skeletons.
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