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A victim of an incurable disease, Stephen Hawking is almost completely paralysed, confined to a wheelchair, and unable to speak. Yet, he has overcome every obstacle and achieved far more than most able-bodied people ever dream of accomplishing and b
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New Data Adds to Understanding of 'Black Holes' WASHINGTON Scientists continue to learn more about black holes in space, places where the pull of gravity is so strong that not even light can escape. Black holes occur after supergiant stars explode in
VOA标准英语2016年(九月)
It suggested a baffling paradox that quasars are really shining black holes, capable of emitting the energy of entire galaxies. But Lynden-Bell then went further. I predicted that there would be these massive objects found in the nearby galaxies. He
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But if watching matter tumble over the edge of a black hole might now be possible, it is only because of the efforts of a generation of astronomers to wrestle these dark dragons of the cosmos into the realms of scientific reality. As is often the cas
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To walkhere on Earth, to be alive, it thanks to a long chain of cause and effect writtendeep into the structure of the universe. A primordial process so long, and soancient that on the scale of a human life it seems almost incomprehensible. One of th
探索与发现2013年
Life on the International Space Station requires intense concentration, critical thinking skills, and strategic contemplation of what could come next, because hundreds of kilometers above the Earth, there is a lot at stake. With one wrong move, you c
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