Stone-tipped spears lethal, may indicate early cognitive and social skills
Phoenix AZ (SPX) Aug 29, 2014 - Attaching a stone tip on to a wooden spear shaft was a significant innovation for early modern humans living around 500,000 years ago. However, it was also a costly behavior in terms of time and effort to collect, prepare and assemble the spear. Stone tips break more frequently than wooden spears, requiring more frequent replacement and upkeep, and the fragility of a broken point could nec ... more
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