Arizona's U.S. Sen. Mark Kelly and his twin brother, Scott Kelly, slammed Elon Musk after he insulted another astronaut on X.

"Hey @ElonMusk, when you finally get the nerve to climb into a rocket ship, come talk to the three of us," Captain Mark Kelly ...

Sen. Mark Kelly (D-Ariz.) and his brother, Scott Kelly, both retired astronauts, on Friday called out tech billionaire Elon Musk over his attacks on an astronaut on his social platform X.

Elon Musk has made unfounded claims that two NASA astronauts were left on the space station for "political reasons" after ...

Scott Kelly is a former military fighter pilot and test pilot, an engineer, a retired astronaut, and a retired U.S. Navy captain. A veteran of four space flights, Kelly commanded the International ...

NASA astronaut Scott Kelly came back to Earth after spending almost an entire year at the International Space Station, ...

Mason's team reportedly found "space genes" that were changed due to the stresses of Scott Kelly's time in orbit. "Whole-genome sequencing showed each twin has hundreds of unique mutations in ...

NASA carried out a 2016 experiment with identical twins Scott and Mark Kelly to highlight some of ... a project scientist at the European Space Agency (ESA). "Without this constant stimulus ...