A team of researchers have evidenced mechanically delivered projectile weapons in Europe dating to 45,000-40,000 years -- more than 20,000 years than previously thought. This study indicated that the spear-thrower and bow-and-arrow technologies allowed modern humans to hunt more successfully than Neanderthals -- giving them a competitive advantage. This discovery offered important insight to understand the reasons for the replacement of Neanderthals by modern humans.
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