Introduction
To study the influence of microgravity, radiation and confinement in long-duration spaceflight, NASA selected twins Scott and Mark Kelly for a unique mission. Scott went to space while Mark was chosen as the control to stay on earth for comparison.
The one year long space mission spanned across March 27, 2015 till March 1, 2016.
Although, biological changes were seen across varying aspects, most of them reverted back to preflight state after a few months.
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NASA's Study of Astronaut Twins Creates a Portrait of What a Year in Space Does to the Human Body
smithsonianmag.com
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A medical student who is interested in the comings and goings of the universe.
Deep space exploration is something which scientists have been aiming for, for a long time. However, among many other technical limitations and complications, biological limitations are also a factor.
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Losing bone density in space
In 2015, Nasa sent Scott Kelly to space and left Mark Kelly, his twin brother, on Earth. The experiment helped them determine that, due to the lack of stress on the skeleton, a person loses ~1% of their bone density after one month in space. For comparison, an average person aged...
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