After a Year in Space, NASA Astronaut's Genes Have Changed. Possibly for Good.

By AmericanDreamer on Thu, 03/15/2018 - 11:31am |

Dominique Mosbergen, HuffPo today.

After spending a year in space, NASA astronaut Scott Kelly is not the man he used to be — at least genetically speaking.

His genetic expression has changed, according to preliminary results from a NASA study that compared the bodily changes between the astronaut and his identical twin, who stayed on Earth while Kelly was aboard the International Space Station.

About 7 percent of Kelly’s genes have yet to “return to normal” ― almost two years after his yearlong expedition came to an end. Kelly has since retired from NASA.

.....

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https://www.huffingtonpost.com/entry/scott-kelly-astronaut-twin-study-dna-change_us_5aaa4639e4b0600b83006deb

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More on this: "The truth about astronaut Scott Kelly's viral 'space genes'", Sarah Kaplan, WaPo today: https://www.washingtonpost.com/news/speaking-of-science/wp/2018/03/16/th...

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At no point in that process was Scott Kelly zapped by an alien laser beam, attacked by a xenomorph or otherwise transfigured into a previously unknown mutant variety of human.

But you wouldn't know that from reading some of the coverage the January announcement inexplicably spawned this week — articles claiming that the mission activated Kelly's “space genes,” that 7 percent of his genes didn't return to normal post-spaceflight, and that he and Mark are no longer identical twins.

Aside from being about old news, these stories are biologically impossible. If 7 percent of Kelly's genome was altered, he would be about as different from a human as a rhesus monkey.

The actual transformation is much subtler. According to a NASA's research — which is still preliminary, with the agency expecting to publish a more complete study this year — it's not Kelly's genes that changed but how they were expressed.

....

by AmericanDreamer on Fri, 03/16/2018 - 3:47pm

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