An curved arrow pointing right. Much of the film Interstellar is centered around the existence of a wormhole and black hole, which happen to be two of the most perplexing things in the universe.

In fact, the prevailing theory is that this isn't a black hole at all, but it's instead a wormhole that has opened up and some very angry Illuminate are going to start spilling out of it any day now.

It's predicted by Einstein's theory of general relativity, but has never been observed in an intense gravitational field such as that of a black hole. Frank Eisenhauer, from the Max Planck ...

Squeeze enough stuff into one spot, space-time itself will pucker up in a sweet cosmic kiss known as a black hole ... musings that also gave us wormholes and white holes; theoretical toys that ...

New research suggests black holes are unstable, challenging Einstein's theory of general relativity and the Kerr solution.

But why do we care? Black holes are cast-iron predictions of general relativity, Einstein’s peerless theory of gravity, and yet they stretch it to breaking point. General relativity says that ...

Wormholes are theoretical tunnels that create ... Could a very short and fat worm hole be able to send messages through time? ‘This is all very much theoretical, but the possibilities are ...

The scientists suggest these primordial black holes could account for some if not all of the dark matter. To support their theory, the team proposed looking for tiny wobbles in Mars' orbit ...

They have not yet found one. The event horizon of a black hole allows researchers to witness gravity at its most extreme, thus seeing if Einstein's theory of general relativity holds up.