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What is a wormhole? © Science Photo Library

What is a wormhole?

Published: 16th February, 2022 at 04:00
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You'll often see wormholes in science fiction as a way to travel across the Galaxy.

A ‘wormhole’, first proposed by Albert Einstein and Nathan Rosen in 1935, is a theoretical ‘bridge’ through folded space-time, which could provide a means of traversing large distances instantaneously.

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Mathematically, wormholes appear to be highly unstable and would likely collapse as soon as they form, as well as being vanishingly small. And they can only form with so-called ‘eternal’ black holes – ones which do not interact with matter or lose mass through Hawking radiation.

So, most scientists would admit that wormholes, although a useful and interesting theoretical possibility, probably don’t exist in reality.

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Asked by: Tam McMillan, Fife

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