The universe is vast, so vast, in fact, that it seems impossible to imagine an “edge.” But what if the universe does have a boundary? And more importantly… what lies beyond it? In this ...

The universe is expanding, but what's it expanding into? Nothing! Astrophysicist Paul Sutter explains this baffling concept, plus how the universe can expand but not have an edge.

Lots of people believe the Universe is infinite, but there's a good possibility that might not be the case. Which means that there would be an actual edge of the Universe. What happens at that edge?

An explosion originating near the edge of the universe has been seen by an orbiting NASA telescope. The burst of gamma rays is the farthest such event ever detected. The blast, designated GRB ...

The universe is an astronomical mystery, one that humans are still trying to understand. What would happen if you somehow managed to reach its edges?