After canceling a spacewalk planned for Thursday, the space agency’s administrator said it was erring on the side of caution ...

NASA said it canceled a spacewalk planned for Thursday after an astronaut had an undisclosed medical issue on the ...

A planned spacewalk outside the International Space Station was scrapped because of what NASA called a "medical concern" with ...

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NASA did not identify the crew member or provide details on the medical concern, citing privacy issues in a brief blog post.

Researchers from the Faculty of Engineering at The University of Hong Kong (HKU) have made a significant discovery regarding ...