NASA Reveals How Space Affected Astronaut’s Body Compared To His Earthbound Win - 02-17


Twins present scientists with a unique opportunity to study the importance of environmental and genetic influences for certain traits, behaviours and disorders. Which is why astronaut Scott Kelly and his earthbound identical twin Mark are so important to NASA - over the years, the space agency has carried out extensive medical tests on both of them in an attempt to better understand the effects that space travel has on the human body.