Quantum gravity is the missing link between general relativity and quantum mechanics, the yet-to-be-discovered key to a ...

Even though this tragedy was hinted at from the first episode, it's treated with gravity and presented in agonizing detail.

A biochemist breaks down challenges that astronauts Suni Williams and Butch Wilmore will face after their long duration in ...

The astronauts will be checked out by flight surgeons as they adjust to gravity, officials said, and should be allowed to go ...

Within 24 hours after their return to earth, the astronauts will begin to lose the unique sensations of weightlessness that ...

NASA official said the astronauts may undergo “vascular and cardio reconditioning” and may feel “dizzy” as their bodies ...

The astronauts will be checked out by flight surgeons as they adjust to gravity, officials said, and should be allowed to go ...

Sunita Williams and Butch Wilmore, the two astronauts stuck at the International Space Station for more than nine months, ...

Massachusetts native Suni Williams and her crewmates splashed down aboard a SpaceX capsule on Tuesday, concluding a dramatic ...

New images of the infant universe captured by the Atacama Cosmology Telescope (ACT) are the most precise "baby pictures" to ...