(NewsNation) — Humans who spend a long time in space, like the two American astronauts expected to return to Earth later this month, can experience a variety of physical changes by the time they get ...

Austrian daredevil Felix Baumgartener leaped from a capsule raised 24 miles into the sky by way of a helium balloon on Sunday, breaking the sound barrier and numerous world records as part of Red Bull ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (NewsNation) — Humans who spend a long time ...