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                3. 西诺网

                  新发现!NASA宇航员太空待340天 DNA发生永久突变

                  NASA宇航员史考特(Scott Kelly)在国际太空站待了340天,科学家很好奇他的身体状况是否有出现变化?于是找来和他基因相同的双胞胎兄弟马克(Mark Kelly)进行比对,结果发现史考特“免疫系统和DNA修复功能”出现突变,从遗传基因的角度来看,是无法恢复的永久损伤。

                  4020380.jpg

                  据《科学》期刊的研究报告,55岁的史考特回到地球3年后,科学家对他展开全身的检查,发现他待在太空的这段期间颈动脉和视网膜变厚、体重变轻、肠道微生物增多,以及?#29616;?#33021;力下降,不过,这些症状大多在回到地球6个月后逐渐消失,唯独基因中8.7%的变化至今仍未恢复。

                  史考特表示,刚回到地球的那几天非常难受,有很长一段时间都没有活力相当疲惫,“?#19968;?#20197;为自己得了流感”。

                  4020381.jpg

                  转载请注明出处!:首页 > 博览 » 新发现!NASA宇航员太空待340天 DNA发生永久突变

                  一波中特最准网址5682

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