Space is doing strange things to astronauts' bodies, Nasa study reveals

Space is doing some strange things to astronauts' bodies, a new study has found. The Nasa twins study is looking at two twins – Scott and Mark Kelly – in an attempt to understand the affects of spaceflight on people's health and physiology. By having one remain on Earth while another lived on the International Space Station for more than a year, researchers are able to compare the two in an attempt to understand what difference to the trip into space made. Now early results show a host of unusual changes happened to Scott when he headed into space. That included the discovery that in some ways, a person's health is not greatly affected at all by a trip into space.