本帖最后由 细胞海洋 于 2012-11-23 22:00 编辑 + K& Q5 r: U/ k" H. q x$ H 8 [' o7 I' W- q3 u. e# s3 U0 x# x1 t! M0 m, O# G
The modern human lineage appeared in Africa between 100,000 and 200,000 years ago, but the roots of modern human technology are much less clearly defined. Curtis Marean and colleagues describe a previously unrecognized advanced stone tool technology from Pinnacle Point in South Africa, dating back to around 71,000 years ago. Previously observed signs of such activity have been less definitive, seeming to appear and disappear — perhaps because of poor sampling — but the current work indicates that these tools persisted for some 11,000 years. The technology is dominated by heat-treated stone 'bladelets' that are thought to have been components of composite tools. The technology provides strong evidence for advanced projectile weapons such as spearthrowers, or even bows and arrows. The authors speculate that weapons made using such bladelets may have been pivotal to the success of modern humans as they left Africa and encountered Neanderthals. Cover art by Erich Fisher. ! s3 Z' a* t$ B1 M: I1 i8 Z 8 G! [5 `0 u" V2 g2 L作者: ditiger 时间: 2012-11-23 22:38
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