"In 65 years of human spaceflight, we've never had to bring somebody back for a medical reason so far," he added. "That's a ...

Suni Williams and Butch Wilmore, the two NASA astronauts who have been stuck at the International Space Station for more than ...

A recent photo of Williams aboard the ISS sparked rumors about her health, restoring the media's habit of prying into the ...

Suni Williams and Butch Wilmore only expected to be in space for about a week. But, more than 150 days later, the two NASA ...

NASA's plagued Space Launch System rocket, which is being developed to deliver the first astronauts to the lunar surface in ...

A new species of tardigrades with thousands of genes that become more active when exposed to radiation could help in devising ...

Sunita Williams clarifies her health status, denying weight loss but detailing body changes from space fluid shifts. Read her ...

NASA astronauts Sunita Williams and Butch Wilmore are currently on the International Space Station. Their mission was ...

NASA has marked the 55th anniversary of Apollo 12 - world's second manned mission to the Moon. Astronauts Charles "Pete" ...

The space superpowers set to land astronauts on the Moon - the U.S. and China - should forge a lunar peace pact protecting ...

Anna Lee Fisher is one of the first American women astronauts and the first mother to ever make it ... She was part of the ...