Gravity used to be the most dependable rule in the cosmic rulebook, the quiet background force that never changed its mind.

Time runs faster on Mars (477 microseconds/day) due to relativity. Discover how this fundamental physics challenge requires dynamic correction to prevent massive GPS errors and secure future deep ...

Fragments of energy may be the fundamental building blocks of the universe. The theory combines the ideas of particles and waves into a concentration of energy that flows throughout space and time.

"Understanding how spaceflight impacts the human brain is crucial as space exploration and tourism expand," a recently-published study explains NASA/Getty Astronauts' average brain position can change ...