Humans are the only species that can throw well enough to kill rivals and prey. Because throwing requires the highly coordinated and extraordinarily rapid movements of multiple body parts, there was likely a long history of selection favoring the evolution of expert throwing in our ancestors. But before the invention of [bows and firearms], our hunter-gatherer ancestors threw darts, knives, spears, sticks and stones at rivals and prey.
Interestingly, while all modern humans can throw well relative to other primates, sex differences in throwing are among the largest behavioral differences between the sexes. These differences emerge early in life and are not strongly influenced by experience or practice ... although a recent study suggests training may eliminate differences in throwing accuracy.
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