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Scott Kelly’s body suffered another surprise in space



(news)
-They called this a “perfect nature and nurturing” experiment: Astronaut Scott Kelly was sent to the International Space Station for nearly a year, and his identical twin, the astronaut, is now Senator Mark Kelly. Kelly (Mark Kelly), still remains on earth. When Scott Kelly returned home in March 2016, scientists compared his DNA and body structure with those of the twins and found that Scott was 2 inches taller than he was before. And have a lower body weight, which includes many other changes (mostly restored thereafter).Now, according to a study published in the journal on Monday cycle, Another major change was announced: Kelly’s heart mass decreased from 6.7 ounces to 4.9 ounces during the space travel, accounting for about 27%, although the astronauts did not seem to be affected in any significant way. Study co-author Benjamin D. Levine, a professor of internal medicine at the University of Texas Southwestern Medical Center, said: “His performance for a year was outstanding.”

; New York Times.

CNN explainer: When humans deal with the gravity of the earth, the heart must work harder to draw blood. However, in zero gravity, the heart does not have to work so hard, and does not have to shrink.Levine told Times Kelly’s heart did not become “dysfunctional” because of this. The study also looked at endurance swimmer Benoit Lecomte, who tried to cross the Pacific in 2018. The buoyancy of the water and Lecomte’s almost constant level during swimming for more than five months produced a condition similar to Kelly’s weightlessness, and his heart was almost as fast in size. Although Kelly performed well in the end, he also used fitness equipment to exercise a lot in space, which may make his heart no longer weak. Scientists are concerned that due to injury, illness or equipment damage, it may prevent astronauts performing future missions from moving and cause more serious consequences. The National Aeronautics and Space Administration (NASA) is funding further research on the heart of astronauts involved in long and short trips. (Read more discovery stories.)




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