Astronaut

For the first time (officially), NASA will set loose some human sperm in outer space.

A space helmet "theater" showed me an astronaut's view of Earth.

The crew on board the International Space Station (ISS) will soon welcome a new member, described by its creators as "a kind of flying brain."

Researchers have shown that space travel puts a powerful, dangerous squeeze on the fragile tips of optic nerves.

John Young, NASA's longest-serving astronaut, who walked on the moon and flew on the first Gemini and space shuttle missions, has died. He was 87.

Astronauts who spend prolonged time in space experience noticeable changes to their brain's structure, a new study finds.

Some former astronauts have a message for flat-Earther B.o.B: The curve is real, and we've seen it.

Humans first journeyed into space in 1961, but even half a century later, questions remain about how spaceflight affects the human body.

Southern Oregon's idyllic Crater Lake — snow ringed and shade dappled — belies its violent past.

The southern lights appear to dance on the horizon off the southern coast of Australia in a stunning new photo taken by an astronaut aboard the International Space Station.