Never give up: Stone tools were invented more than once - SlashGear
 

Never give up: Stone tools were invented more than once SlashGearResearchers released a new paper this week which suggested stone tools were invented here on Earth more than once. At one point they started to appear in Kenya, then at another point ? several hundred thousands of years later ? they began to appear again. This isn?t what our teachers taught us in grade school. When I was a kid, I was taught that a very simple transition occurred when apes were on their way to evolving into humans. At some point, one of our links decided to start using tools ? and that was that! Suddenly our ancestors crossed a barrier and never went back. But that?s just no...

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