The oldest surviving traces of sloths date back to the Pleistocene. At the time, there lived the Megatherium – great beast – that reached the size of a contemporary elephant. Contrary to its modern relatives, Megatherium was one of the largest mammals ever to walk Earth, weighing about 5 tons. It usually moved on four legs, but it also had a bipedal posture, reaching a height of about 6 meters. Such a large size allowed it to feed at heights not reached by modern herbivores. However, they also feed on leaves of yucca, agave, and grass.
