Bizarre portal-like ‘ring wormholes’ could let you time travel
A ring wormhole is one that you could simply step through, like a portal through space – but new, more detailed models have shown that they could be a portal through time as well
![Bizarre portal-like ‘ring wormholes’ could let you time travel](https://images.newscientist.com/wp-content/uploads/2023/07/14210325/SEI_164124946.jpg)
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