Space Genes News Today

With that drop of water. nasa studying the effects of space on the human body, and they were going to compare scott to his twin brother, mark, when he got back. >> scott kelly, back on mother earth. >> reporter: and tonight, the results are in. twins who had the same genes when they started, could it be that space has altered that, even slightly? nasa tonight suggesting that that year in space activated so-called space genes. they witnessed a 7% change in gene expression. meaning 7% of scott kel...