Mark Kelly

Does a Year in Space Make You Older or Younger?

The Kelly brothers. Scott (right) and Mark Kelly were the subjects of a twins study aimed at discerning effects of space travel on the human body. Credit: Robert Markowitz/ NASA

World’s Media Bungled Twin Astronauts Study So Bad That NASA Had to Step In

NASA Sent a Twin to Space to Study Nature Versus Nurture and We’re Starting to Get Results

Andreas Mogensen, Aidyn Aimbetov and Gennady Padalka rest outside their spacecraft and are surrounded by support personnel after landing. Credit: NASA

Record-breaking Astronauts Return to Earth – Taking Us One Step Closer to Mars