Pakicetus' descendants continued to adapt, leading to the evolution of Ambulocetus, which lived between 50 and 48 million years ago. Ambulocetus was well-suited for life both on land and in the water.

Their land-dwelling ancestors lived about 50 million years ago. Meet Pakicetus, a goat-sized, four-legged creature that scientists recognise as one of the first cetaceans (the group of marine animals ...

Once land-dwelling creatures that walked on four legs, these marine mammals evolved from their ancestors, like Pakicetus, which roamed the shores of present-day Pakistan. Pakicetus, a goat-sized ...