NASA makes us proud to be Americans. And even more so, the agency is an engine of discovery and innovation that benefits all ...

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

Kelly laments the death of astronaut Jim Lovell and a U.S. disinvestment from science while sidestepping White House talk.

Mark Kelly's four years in the Senate came after a career in the military, at NASA and on front lines of advocacy for gun ...

America is becoming a nation of homebodies' Diana Lind at The Washington Post. Americans are "voluntarily spending an extra ...

Kelly’s name has arisen as a potential candidate for both president and vice president in the past. Kelly, who was elected to ...

Mark Kelly, former Navy Captain and NASA astronaut, running for the late Sen. John McCain's Senate seat in Arizona, discusses gun control, climate change and impeachment.

NEW YORK -- You would expect a trip to space to be transformative, but NASA says it can lead to permanent DNA changes. The space agency studied the DNA of twin astronauts Scott and Mark Kelly.

Kelly is participating in a study along with his twin, former astronaut Mark Kelly, about the long-term effects on humans in space. The implications of the study are expected to help NASA better ...

Kelly, a retired NASA astronaut and Navy combat veteran, is the husband of former Rep. Gabby Giffords, who in 2011 survived an assassination attempt. Kelly, 61, is up for reelection in 2028.