A simulation wormhole: could this help physicists unite gravity and quantum theory?

Might our universe – as vast as it is – be simply one of many? We look at the growing evidence that there’s more than one cosmos out there

GLOBAL EYE

GLOBAL EYE

It’s difficult to know for sure how many electrons are in the Universe. British physicist Arthur Eddington (1882–1944) came up with a number in 1938, now known as the ‘Eddington number’. Eddington’s c

Imagine you’re in a woodland, with sunlight filtering through the endless green canopy overhead. There’s uniqueness everywhere. Some trees grow bolt upright, but others are wizened and twisted. Here t

Earth exists in a bubble. Our atmosphere forms a protective barrier between everything on the planet’s surface and the near-empty vastness of space. But it’s not the only bubble Earth sits inside. Bey