Scott Kelly spent a year in space – was he the same as his twin when he got back?

Scott Kelly is an American astronaut who worked for NASA from 1996 to 2016 and took part in a year-long experiment aboard the ISS (International Space Station). He undertook the experiment alongside his identical twin brother, Mark, who stayed firmly on the ground while he was sent up into space. The experiment was aiming to detail the differences between the identical twins during the time Scott spent up in space, and the immediate after effects of that time in zero gravity. As there was a genetic copy of Scott on Earth (his twin brother), this was the ideal experiment to show exactly what effects space travel has on the human body.

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Scott studied hard, earning two degrees, and joined the military, enrolling in the U.S. Navy. He succeeded greatly in both fields, rising to prominence and being chosen by NASA to join their team of pilots and astronauts. Not to be outdone, his brother followed a very similar path, and they both were able to get into space through their military training and engineering knowledge. There was a question that, up until now hadn’t been answered – how exactly does the body change when traveling through space? Are there any more differences that happen on a molecular level that the human eye wouldn’t be able to see? In a show of his support for science, Scott agreed to undertake the study despite the risks that were present. He agreed to stay up in space for 340 days. The goal of the experiment was to provide scientists with enough data to help analyze whether extended space exploration missions are viable in the future.


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Scott is now retired from the space program and can hold his head up high having done an awful lot for the future of humanity. Space exploration will allow the human race to develop new energy solutions as well as learn about the effects the solar system has had on our planet. If we can explore the other planets, we might be able to deduce exactly how and when the Earth was created and whether there was ever life on any neighboring planets. As many people have become aware, the planet is running low on raw materials, which is why renewable energy is becoming more and more necessary. Space exploration can both help us find new raw materials while trying to avoid damaging our own planet any further. NASA’s budget for 2017 was $19.65 billion, which was a substantial $600 million over what they had requested for the year.

This article will explore some of the amazing things Scott Kelly got up to when he was stationed on the ISS for almost a year. But what effects did space travel have on his body? And was he really still the same as his twin once he got back to Earth?

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