Humans arrived in Americas earlier than previously thought, co-existed with mastodons, researchers believe
Salutations, PauLO Not all sloths were fuzzy, slow-moving creatures that lived in trees. They had enormous claws when they were startled, and their prehistoric ancestors weighed up to four tons. Along with many other large species that previously roamed North and South America, such as mastodons, saber-toothed cats, and dire wolves, scientists have thought that … Read more