The Family Megatheriidae is commonly known as the ground sloth, which is a prehistoric animal that roamed the earth millions of years ago. Other synonyms for this family include the giant sloth, the massive sloth, and the hairy elephant. These animals were once abundant in the Americas and could grow up to 20 feet in length, making them one of the largest extinct mammals on the planet. Despite their massive size, they were herbivores and fed on leaves, branches, and fruits. Today, the remains of these remarkable creatures can be seen in museums, and they continue to stir the imagination of paleontologists and animal enthusiasts alike.