• 加拿大亚伯达省古代曾遭大规模陨星撞击

    14-05-08 The discovery of an ancient ring-like structure in southern Alberta suggests the area was struck by a meteorite(陨星) large enough to leave an eight-kilometre-wide crater, producing an explosion strong enough to destroy present-day Calgary, say re...

  • 炸药对高强度冲击波有何反应?

    13-12-13 Lawrence Livermore National Laboratory researchers have combined ultrafast time-resolved experimental measurements with theory to reveal how an explosive responds to a high-impact shock. The work involved advances in both ultrafast experimental shoc...

  • 科学家着手制作恐龙灭绝明细图

    13-12-10 About 65 million years ago, an asteroid(小行星) or comet crashed into a shallow sea near what is now the Yucatn Peninsula of Mexico. The resulting firestorm and global dust cloud caused the extinction of many land plants and large animals, includi...

  • 地月系统是由大碰撞形成的

    12-10-18 The giant impact believed to have formed the Earth-Moon system has long been accepted as canon(标准,教条) . However, a major challenge to the theory has been that Earth and Moon have identical oxygen isotope compositions, even though earlier impa...

  • Black swan “黑天鹅”事件

    12-03-12 Black swan is the event that is a surprise (to the observer) and has a major impact. 黑天鹅事件指突然发生并且产生巨大影响的事件。 The term black swan was a Latin expressionits oldest known reference comes from the poet Juvenal's characterization of...

  • 火星上发现一处陨石坑

    11-03-06 ESA's Mars Express has returned new images of an elongated(细长的) impact crater in the southern hemisphere of Mars. Located just south of the Huygens basin, it could have been carved out by a train of projectiles striking the planet at a shallow...

  • 火星赤道附近存在神秘而狭长的陨石坑

    10-08-30 Orcus Patera is an enigmatic(神秘的) elliptical(椭圆的) depression near Mars's equator(赤道) , in the eastern hemisphere of the planet. Located between the volcanoes of Elysium Mons and Olympus Mons, its formation remains a mystery. Often over...

  • 新式冲击传感器为运动员提供详细运动信息

    10-05-16 As athletes strive for perfection, sports scientists need to exploit every technological advance to help them achieve that goal. Researchers in New Zealand have now developed a new type of wearable impact sensor based that can provide much needed in...

  • 天体碰撞导致恐龙灭绝的理论被确证

    10-03-05 An international panel of experts has strongly endorsed evidence that a space impact was behind the mass extinction event that killed off the dinosaurs. 一个国际专家小组强烈支持一场太空大碰撞导致地球上恐龙灭绝的理论。 The dinosaurs were one of many...

  • Recession barely dents 'eco-debt' 经济危机对资源消耗没有影响

    09-09-25 The recession has had little impact on humanity's over-consumption of resources, says a report. 一份报告称,经济危机对人类的过度消耗资源几乎没有影响。 The world first went into ecological debt in 1980, according to Nef The New Economics Foundation (...