Mr. Kelly is a U.S. senator from Arizona and a former NASA astronaut. There’s no country better at solving hard problems than ...

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

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

NASA Administrator Bill Nelson also attended Mark Kelly's induction ceremony. He was raised in Malabar, graduated from Melbourne High, represented the Space Coast in Congress, and flew aboard ...

Mark Kelly wrote that his parents also taught him and demonstrated for him the importance of a strong work ethic. His father told the boys they could join the welders' union, he had a contact there.

Before Mark Kelly emerged as one of the lead contenders for VP on the Democratic ticket, the former astronaut earned more than a million dollars on the speaking circuit.

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 ...

Identical twins Mark Kelly, left, and brother Scott, right, are veterans of multiple spaceflights. Scott Kelly lived aboard the International Space Station for 340 days in 2015-16. NASA ...

Kelly says his twin brother, Scott Kelly, who just returned to Earth after 340 days in space, was temporarily 2 inches taller. NASA is studying the pair to explore what spaceflight does to the body.

June 21, 2011 -- Mark Kelly, the astronaut husband of Rep. Gabrielle Giffords, announced today he is retiring from NASA to spend time with his wife and write a memoir with her.