New Scientist Default Image

An attempt to pass through a wormhole between universes could collapse it

Science Photo Library/Alamy

When a wormhole reaches the end of its life, the “mouths” at either end may expand and get closer to one another before disconnecting and carrying on as regular black holes – and the trigger for this death could be any energy that perturbs the wormhole, including a person leaping in.

Wormholes are hypothetical tunnels between two black holes that connect distant regions of space-time or even separate universes. There is no observational evidence that they exist – nor that separate universes exist – but …