" Another tool-related skill that apparently evolved in the genus Homo and that helped change our bodies is throwing. Even if the first hunters lacked tipped spears to kill animals from a distance, they still had to throw or thrust simple javelin-like weapons. Only humans can do this. Chimps and other primates sometimes toss rocks, branches, and nasty stuff like feces with reasonable aim, but they cannot throw anything with a combination of speed and accuracy. Instead, "

― Daniel E. Lieberman , The Story of the Human Body: Evolution, Health, and Disease