Megalonyx molaris is an extinct species of giant ground sloth that lived during the Pleistocene epoch. It was part of the family Megalonychidae and is known for its large size, with some individuals reaching up to 3 meters in length. Fossils have been found primarily in North America, indicating that it inhabited a variety of environments, including forests and grasslands. This species is characterized by its unique molar teeth, which were adapted for grinding tough plant material. Megalonyx molaris likely played a significant role in its ecosystem by influencing vegetation patterns through its feeding habits. Its extinction is believed to be linked to climate change and human activities.