Lucy, one of the most ancient human ancestors, probably died because she fell out of a tree

Lucy, one of the most ancient human ancestors, probably died because she fell out of a tree

Lucy was a tiny—just three and a half feet tall and about 60 pounds. When she lived 3.2 million years ago in Ethiopia, she likely spent her days foraging for food and her nights sleeping in trees to avoid predators. Unfortunately, her makeshift tree house was probably the cause of her death. On Aug. 29,…