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

NASA astronaut Scott Kelly (R), member of the 43 International Space Station crew, and his twin brother Mark pose after a news conference at Baikonur cosmodrome March 26, 2015. (REUTERS/Maxim Zmeyev) ...

In March 2016 NASA astronaut Scott Kelly returned to Earth after a historic 340-day stint on the International Space Station a changed man – his time in orbit had altered part of his DNA.

Astronaut Scott Kelly said today he's excited to return to Earth to see his family but added he has enough stamina to "go another year" living in space.

In a few hours, NASA astronaut Scott Kelly is due to be back on Earth. Kelly has completed a nearly yearlong mission on the International Space Station, the longest any U.S. astronaut has been in ...

If NASA had allowed it, astronaut Scott Kelly would have loved to climb out of the Soyuz capsule after landing on Tuesday and walked on his own, Kelly’s brother, Mark, said during a news ...

Former NASA astronaut Scott Kelly knows a thing or two about isolation. In 2016, Kelly became the first American to spend 12 consecutive months in space when he completed a 340-day stint on the ...

NASA astronaut Scott Kelly is back on Earth. Kelly and Russian cosmonauts Mikhail Kornienko and Sergey Volkov landed late Tuesday night in the Kazakhstan desert, NASA and Russian mission control said.

Scott Kelly, a retired U.S. astronaut, spent 520 days in space over four missions. Working in outer space is a lot like working on earth, but with different challenges and in closer quarters.

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 ...

Scott’s twin Mark Kelly, who retired from the astronaut corps in 2011 and kept his feet firmly planted on the ground during his brother’s latest flight, is also undergoing many of the same tests.