DNA of Astronaut No Longer Matches His Twin After He Spends a Year in Space
They were born with the same DNA, but after one of them spent a year in space, things have changed. NASA's Twins Study is giving researchers insight into the effects of space travel on the body. Astronaut Scott Kelly spent 340 days aboard the International Space Station, which is twice as long as astronauts have spent up there. InsideEdition.com's Mara Montalbano (https://twitter.com/MaraMontalbano) has more.