We can be curious about existing forms of life but still do not know much about ourselves. These are twenty facts about humans you might have never heard of.
我们可能好奇于现存的生命形式，但仍然对自己所知甚少。以下这二十有关人类的真相你可能从未听说过。
1. Some stars in the universe are cold enough to be touched by humans.
宇宙中的一些恒星冷的足以让人类无法触及。
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