科学美国人60秒 SSS 2014-08-29

From the depths of space, an asteroid hurtles toward Earth. [Well, our general vicinity.] But this is no ordinary hunk of galactic debris. Because the body of this asteroid seems to defy gravity. Its bound by forces never observed on this scale in sp

发表于:2018-12-24 / 阅读(48) / 评论(0) 分类 2014年Scientific American(八)月
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