Black holes could be "back doors" to other parts of universe, scientists claim

Black holes could be "back doors" to other regions of the universe, the Mirror reports, citing a new study.

However, it is unlikely anyone passing through one of the gateways would survive, say scientists.

First they would be "spaghettified" - stretched out like a strand of pasta - by the black hole's immense gravity.

Once on the other side of the "door" the traveller would be compacted back to normal size, but could not count on being restored back to life.

Black holes are places where matter has been squashed to such a density by gravity that the normal laws of physics break down.

The new theory rejects the view that at the centre of a black hole spacetime curves to an infinite point known as a "singularity" and all matter is destroyed.

Instead, it proposes that the heart of the simplest type of electrically charged, non-rotating black hole, is a very small spherical surface. This acts as a "wormhole" - a doorway or tunnel through the fabric of spacetime of the kind seen in countless sci-fi stories.

In the movie Interstellar, a team of astronauts travel through a wormhole in search of a new home for humanity.