Footprints of a hippopotamus going for a swim in Kenya have been dated to 1.4 million years ago. The marks may be the first discovered tracks of the now-extinct species Hippopotamus gorgops, LiveScience reports. To verify that the tracks were created by the mammal, scientists observed the modern-day species going for a dip. Their behavior, described in Palaeogeography, Palaeoclimatology, Palaeoecology, matched the tracks seen in Kenya, with signs of the species pushing upward off the floor with its hind legs and dragging its feet across the ground.
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