What happened to NASA astronaut Scott Kelly after spending a year in space while twin brother Mark, also an astronaut, ...

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

Weill Cornell Medicine professor Dr. Christopher Mason and former astronaut Jose M. Hernandez shared their expectations for ...

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

WASHINGTON − Elon Musk and Sen. Mark Kelly, D-Ariz., traded jabs on social media Monday, after the billionaire space ...

Mark Kelly of Arizona on Friday became one of the highest profile figures yet to ditch his Tesla in favor of a new ride, ...

Sen. Mark Kelly, D-Ariz., traded his electric Tesla Model X for a gasoline-powered Chevy Tahoe, citing his criticism of ...

Suni Williams and Butch Wilmore were originally supposed to spend only about a week in space before technical difficulties ...

Arizona Senator Mark Kelly, a former Space Shuttle commander, has parted ways with his black Tesla Model S following a heated ...

Sen. Mark Kelly (D-Ariz.) slammed Elon Musk for calling him “a traitor” for visiting Ukraine, comparing his track record to ...

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