amnhnyc:Like hippos, their closest living relatives, whales are descended from an ancestor that ha
amnhnyc: Like hippos, their closest living relatives, whales are descended from an ancestor that had four legs and walked on land. One such “walking whale” is Ambulocetus natans, which lived about 49 million years ago in what is now northern Pakistan, in long-lost coastal shallow seas and brackish rivers. -- source link
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