What lies beyond the universe? For centuries, scientists have pondered this question, and recent groundbreaking discoveries ...

WASHINGTON — By some estimates, the known universe may contain as many as 2 trillion galaxies, with the average galaxy holding approximately 100 million stars and untold numbers of planets. But ...

Theories that posit the existence of many different universes are built on philosophy as much as physics.

While parallel universes are a staple of science fiction, there are some real scientific theories to support them. But if parallel universes do exist, could we ever travel to them? It certainly ...

The idea of multiple universes actually dates back to the Ancient Greeks like Democritus, or even earlier to pre-Socratic philosopher Anaximander and his idea of infinite worlds, but today ...

A new theory published late last year is offering an explanation as to why our universe is expanding at an accelerating rate: Merging with "baby" universes.

Astronomy fans can zoom in practically forever into the stunning first images from the Vera C. Rubin Observatory ...

The Big Bang Theory' premiered nearly two decades ago — and the TV universe has only grown with three spinoffs ...

Our individual decisions don’t create branching — rather, every single quantum event that occurs creates its own branch, spawning multiple universes with every new outcome.

While parallel universes are a staple of science fiction, there are some real scientific theories to support them. But if parallel universes do exist, could we ever travel to them? It certainly ...

While parallel universes are a staple of science fiction, there are some real scientific theories to support them. But if parallel universes do exist, could we ever travel to them?