gravity

Earth is spherical, but what would happen if the Earth were flat? We explore some of the bizarre implications of a flat world which would make life as we know it virtually impossible.

Some of Hawking's theories revolutionized the way we view the universe, but others still leave scientists scratching their heads.

Scientists have used computer models to predict the size of minuscule deformations, or mountains, on the surfaces of neutron stars, which are responsible for causing gravitational waves as they spin.

Why is the universe the way it is? Over the years, scientists have explored many ways to explain the cosmos, leading to some crazy-sounding ideas.

Here's how we might stop the flow of time.

A simulated binary system animation shows how extreme gravity warps two black holes locked in a mesmerizing "dance."

Walking around the moon could be faster than we originally thought, but actually doing it would require some serious planning.

Scientists analyzed the hearts of retired astronaut Scott Kelly after he spent time in space and elite endurance swimmer Benoît Lecomte after he swam the Pacific Ocean.

The experiment could be a trial for many more even smaller ones probing the long-kept secrets of quantum scale gravity.

Like mad scientists, researchers are creating miniature black holes in their laboratories. Their mission? To see if a mysterious form of radiation predicted by Stephen Hawking exists.