Astronauts who spend long periods in space push human endurance and science to new levels. Often returning to space multiple ...

"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 ...

Ten years after launching a patchwork of stars from her place in space, astronaut Karen Nyberg is calling for quilters to ...

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

In a video released Monday by NASA, stranded astronaut Sunita Williams, 59, offered a surprising reason for her weight loss ...

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Indian-origin astronaut Sunita Williams, currently on a long-duration mission aboard the International Space Station, ...

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 and Russia at odds over cause and severity of the International Space Station's leak risks, including possibility of ...

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

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

NASA astronaut Sunita Williams is speaking out after a photo provoked concern about her health. She's reassuring everyone ...