ISHANGO - MEN WHO LIVED AT THIS SITE IN AFRICA MORE THAN 8500 YEARS AGO APPEAR TO HAVE BEEN INSPIRED INVENTORS - THEY INDEPENDTLY DEVISED HARPOON, AND MAY EVEN HAVE CREATED A NUMBER SYSTEM

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HEINZELIN, JD
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O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
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07 ; 0710 ; 09 ;
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