Scott Kelly and Mark Kelly are American astronauts and identical twin brothers. They participated in NASA's Twins Study, ...

Billionaire Elon Musk and Democratic Senator Mark Kelly have traded barbs, following the latter’s recent trip to Ukraine. ...

Sen. Mark Kelly (D-Ariz.) clapped back at tech billionaire Elon Musk after he called Kelly a “traitor” for visiting Ukraine ...

Senator Mark Kelly, an Arizona Democrat and former astronaut, visited Ukraine over the weekend and said the United States ...

Mark Kelly a "traitor" in a post on X after Kelly posted that ... When Musk attacked Danish astronaut Andreas Mogensen last ...

Kelly added more comments on X Monday about the U.S.’ change in policy after saying he made the trip with his twin brother, ...

Mark Kelly of betraying his country after the Arizona Democrat ... Last month, the Tesla and SpaceX CEO called the senator a ...

Elon Musk has picked a fight with Democratic Sen. Mark Kelly of Arizona, and the former astronaut and ex-Navy pilot seems ...

Scott Kelly, a former astronaut, discussed the return of NASA astronauts from the International Space Station on Fox News. He ...