Megalonyx is an extinct genus of giant ground sloths that lived during the late Pleistocene epoch. These large mammals were part of the family Megalonychidae and are known for their robust bodies and long claws, which they likely used for foraging on vegetation. Fossils of Megalonyx have been found primarily in North America, indicating they roamed the region during a time when large herbivores were common. The size of Megalonyx varied, with some species reaching lengths of up to 3 meters (10 feet). They were herbivorous, feeding on leaves, fruits, and other plant materials. The extinction of Megalonyx is believed to be linked to climate change and human activities, which altered their habitats and food sources.