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Join astronomers in a race to find a planet that can sustain life. Amid all the space in the universe, is there another world like ours?　　Astronomers studying a nearby star say they've found the first potentially habitable planet—likely a rocky place with an atmosphere, temperate regions, and crucially, liquid water, considered vital for life as we know it. Other extrasolar plan... 夏夜韩剧在线播放、哆啦a梦大雄的新恐龙在线观看免费、城中之城1-40集免费观看完整版