By observing tiny ripples in spacetime called "gravitational waves" that propagate away from colliding black holes, ...

This is called the “heat death” of the Universe, but you can think of it instead as the death of heat. There will be no more differences in temperature anywhere, which means thermodynamics shuts down, ...

The question of what lies beyond the universe has fascinated scientists, philosophers, and dreamers for centuries. While there’s no definitive answer, a variety of intriguing theories offer ...

The majority of our evidence for dark matter’s existence comes from observing visible (or baryonic) matter that does not ...