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340万年前两种人类祖先曾同时存在
2023-12-06A team of scientists has announced the discovery of a 3.4 million-year-old partial foot from the Woranso-Mille area of the Afar region of Ethiopia. Th...
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研究人员发现光穿透金属的新方法
2023-12-06Helping bridge the gap between photonics(光电) and electronics, researchers from Purdue University have coaxed a thin film of titanium nitride(氮化物) into...
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大面积海洋保护区有利于保护海豚
2023-12-06Ecologists in New Zealand have shown for the first time that Marine Protected Areas -- long advocated as a way of protecting threatened marine mammals...
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橡树岭实验室将聚乙烯转化为碳纤维
2023-12-06Common material such as polyethylene(聚乙烯) used in plastic bags could be turned into something far more valuable through a process being developed at t...
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骨髓细胞对慢性缺血性心力衰竭疗效不大
2023-12-06Use of a patient's bone marrow cells for treating chronic ischemic(缺血性的) heart failure did not result in improvement on most measures of heart fun...
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人类起源于东非大裂谷
2023-12-06The huge changes in Earth's crust that influenced human evolution are being redefined, according to research published March 26 in Nature Geoscien...
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欧洲尼安德特人在人类出现前就已绝迹
2023-12-06Western Europe has long been held to be the "cradle" of Neandertal evolution since many of the earliest discoveries were from sites in this ...
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双髻鲨遭遇双重困境
2023-12-06Identity confusion between a new, yet unnamed shark species, originally discovered off the eastern United States by Nova Southeastern University Ocean...
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墨西哥湾漏油对深海生物的影响
2023-12-06Compelling(引人注目的) evidence of the impact of the Deepwater Horizon oil spill on deep-sea corals will be published online in the Early Edition of the jo...
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探秘人类直立行走的起源
2023-12-06Most of us walk and carry items in our hands every day. These are seemingly simple activities that the majority of us don't question. But an inter...