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天体物理学新闻组
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US Space Agency Expands Search for Distant Planets Able to Support Life The search for worlds orbiting distant stars will intensify in the coming weeks when the American space agency NASA launches a spacecraft. Scientists hope the spacecraft will enl
发表于:2019-01-03 / 阅读(153) / 评论(0)
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This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute? When the internet first got kicking, some scholars of democracy and civil society thought that online discussions could create what they called a conversationa
发表于:2019-01-08 / 阅读(157) / 评论(0)
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