Is Science Fiction Becoming Science Fact?
CBS Denver — Astronaut Scott Kelly set a record for the longest single spaceflight in history and now NASA is saying the trip made him a “new man” as well. A study of Kelly and his identical twin brother found that spending nearly a year in space significantly changed the astronaut’s DNA.
Kelly spent 340 straight days aboard the International Space Station from 2015 to 2016. When the NASA veteran returned to Earth, researchers immediately noted that he had grown two inches in height. A new study comparing Scott to his identical twin, Mark — who is also a NASA astronaut and stayed on Earth during the 340-day trip — has revealed that long-term space travel alters more than just your height.
“Scott’s telomeres (endcaps of chromosomes that shorten as one ages) actually became significantly longer in space,” NASA researchers wrote in a statement. The space agency added that Kelly had hundreds of “space genes” activated by the year-long flight which reportedly altered the astronaut’s “immune system, DNA repair, bone formation networks, hypoxia, and hypercapnia.”
While Scott Kelly’s height and 93 percent of his DNA returned to normal after returning to Earth, NASA confirmed that seven percent of his genes have remained changed and may stay that way. “This is thought to be from the stresses of space travel, which can cause changes in a cell’s biological pathways and ejection of DNA and RNA,” researchers added.
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"Mutation: it is the key to our evolution. It has enabled us to evolve from a single-celled organism into the dominant species on the planet. This process is slow, and normally taking thousands and thousands of years. But every few hundred millennia, evolution leaps forward." . Professor Charles Xavier |
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