Astronaut Scott Kelly spent 340 days in space on the international space station. While his twin brother spent time on Earth as a control subject. Scott experienced muscle and bone degeneration in space, as well as molecular changes, although many of these were short lived effects and have since returned to normal since he has returned to Earth.
- Astronaut Scott Kelly spent more than 340 days on an extended deployment to the International Space Station, setting a record for the longest stay in space by a U.S. astronaut.
- The most obvious (and expected) changes were noticed in areas like bone and muscle mass (both decrease in space) as well as some changes in circulation in eyesight.
- He also saw slight decreases in cognitive ability and speed, though it’s unclear if the change is substantial enough to be related. It could take up to two years for scientists to release more detailed and thorough findings.
While the data still has months of analysis to undergo, information released this week showed some notable changes to Scott’s body.