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They're forever

作者:朱妍聪    发布时间:2019-03-07 05:01:01    

DIAMONDS provide the most lasting evidence of ancient asteroid impacts, according to geologists in Germany. Falko Langenhorst of the University of Bayreuth and his colleagues have shown that the heat and pressure of an impact convert bits of buried coal or graphite into diamonds (Geology, vol 27, p 747). “The shape of impact diamonds is the same as for the precursor graphite,

 

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