Land of Giants, Walking with Beasts, BBC Documentary Series, Episode 3

25 million years ago, Late Oligocene (Mongolia) Filming location: Mexico, Arizona The third episode takes place during the late Oligocene, in Mongolia, where there were seasonal rains followed by a long drought. It focuses on a mother Paraceratherium, a massive hornless rhinoceros, the largest land mammal to ever live as one night, she gives birth to a healthy male calf, while trying to fend off the predatory Hyaenodon. By morning, the calf slowly learns how to walk and after a week, his mother takes him out to the open plain where he will spend the rest of his life. The inquisitive calf runs into a mother Cynodictis, who drives him out of her family burrow to protect her pups.