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

After a stream of erroneous media coverage about how spaceflight affects astronauts' genes, NASA issued an updated statement yesterday (March 15) about its "twins study" of former astronauts Scott and ...

Scott Kelly is a former NASA astronaut and retired United States Navy Captain, U.S. spaceflight record holder and an experienced test pilot having logged more than 15,000 hours of flight time in ...

Kelly’s 340-day mission eclipsed the previous U.S. record-long spaceflight of 215 days, set by former astronaut Michael Lopez-Alegria aboard the space station in 2007.

Welcome home, Scott Kelly! The NASA astronaut returns to Earth on Tuesday, after spending 340 days aboard the International Space Station. Kelly, 52, will board the Russian Soyuz space capsule along ...

For 340 days, Scott Kelly circled the Earth aboard the International Space Station, gathering data about himself. He drew blood from his arms. He saved his urine. He played computer games to test ...

Commander Scott Kelly and his American co-worker, Dr. Kjell Lindgren, completed their first-ever space walk today lasting seven hours and 16 minutes as they completed a series of upgrades to the ...

-- Astronaut Scott Kelly retired today after 20 years with NASA and spending a year in space. During his career, Kelly completed four separate missions in 1999, 2007, 2010 and 2015, accruing 520 ...

Astronaut twins Scott, Mark Kelly give clues to health effects of spaceflight KTRK Friday, February 3, 2017 Nasa study on space twins sheds light on space travel ...

NASA astronaut Scott Kelly posted a photo of a blooming flower aboard the International Space Station in 2016. Astronaut Don Pettit successfully grew a sunflower aboard the ISS in 2012.

After Tuesday night's State of the Union address, most Americans know two things about Scott Kelly. First, he's going to space for a year, and second, President Obama wants him to "Instagram it ...