A Year in Space
Spotlight English
00:00
Space Is a Different Environment Than Earth
Scott Kelly has a brother named Mark Kelly. They look almost exactly alike and are identical. But most importantly, they have the same genes. Scientists examined the twins before Scott went to space. When he was in space, Scott sent the scientists' genetic samples. And when he came back, they examined both twins again. The results could compare scientifically what space did to Scott's body.
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