Mark and Scott Kelly, twin brothers and former NASA astronauts, spoke to "CBS Mornings" about how the agency is set to lose ...

Mark and Scott Kelly, brothers was are both veterans of four spaceflights, join CBS Mornings to discuss today's SpaceX ...

Kelly says his year in space took a physical toll. — -- Scott Kelly, who recently returned to Earth after almost a year in space, plans to share more about the toll his time in orbit has ...

Astronaut was greeted in Houston by his twin brother, Mark Kelly. — -- Astronaut Scott Kelly arrived in Houston early this morning where he was reunited with his family after a whirlwind year ...

While Scott was in space, his telomeres actually lengthened. Most of the changes, including the lengthening of the telomeres, faded away after Scott’s return to Earth in March 2016.

NASA astronaut Scott Kelly returned to the U.S. on Thursday after spending nearly a year in space. Now that Kelly is home, his journey is just beginning.

Kelly returned from the International Space Station on Wednesday, ending a 340-day mission that set a U.S. record. It took him a full day to get back home from the landing site in Kazakhstan to ...