Butch Wilmore and Suni Williams splashed down in the Gulf of Mexico on Tuesday, ending their record-long spaceflight after spending 286 days at the International Space Station ...
Scott Kelly and Mark Kelly are American astronauts and identical twin brothers. They participated in NASA's Twins Study, conducted between 2015 and 2018.
What exactly happens to the body in space and what are the risks? In space, astronauts are exposed to varied and increased levels of radiation that are different from those on Earth. Read on to know ...