For decades, physicists have faced one of science’s greatest puzzles: merging quantum mechanics, which describes tiny ...

A new theory promises to simplify our approach to the universe's earliest moments, but some cosmologists say further ...

Physicists are rethinking time itself. Long treated as a basic part of the universe, time may instead be an illusion—a side ...

The Big Bang made matter and antimatter in equal measure, so where did all the antimatter go? This cosmic imbalance may hold ...

A test using atomic clocks will watch superpositions ride Earth’s curved space-time and see if Einstein can play nice with ...

Instead of the big bang, some physicists have suggested that our universe may have come from a big bounce following another ...

Possibly originating with the English poet Geoffrey Chaucer's "time and tide wait for no man," the idea that time waits for ...

Records from Albert Einstein's final years are being published as a book around 20 years after their discovery, as ...

A short-lived ripple in space-time revealed that two black holes merged into a giant black hole with the mass of 225 suns ...

Instead of the big bang, some physicists have suggested that our universe may have come from a big bounce following another ...

Two colossal black holes among the most massive ever seen collided in deep space, creating gravitational waves that rippled ...