Time dilation, a captivating concept embedded in Einstein’s theory of relativity, has been experimentally validated on Earth.

A new study suggests that spending time in space can actually speed up the physical aging process on a cellular level.

Weak magnetic fields once exposed humans to radiation. People adapted with shelter, clothing, and mineral protection. Our ...

Did you know nearly 17,500 satellites have been launched since 1957? Or what about the fact that more than 10% of those ...

Stem cell aging is potentially worrisome because it diminishes the body’s natural ability to repair tissues and organs.

Scientists have captured the most detailed look yet at a black hole merger 1.3 billion light-years away, with LIGO detecting ...

HOUSTON, Texas -- NASA astronaut Mark Vande Hei broke an American record for spending the most time in space, but there is much discussion in his first news conference back on Earth that focused on ...

Astronaut Scott Kelly returned to Earth on Wednesday after an unprecedented year in space for NASA, landing in barren Kazakhstan with a Russian cosmonaut who shared his whole space station journey.

Watch an exclusive clip from 'Earth to Michael,' a documentary directed by Nico López-Alegría and ZZ about the gulf between ...

A total lunar eclipse will turn the moon blood red for millions across Asia and Europe overnight on Sept. 7-8. Here are the best times to watch the show unfold.