Einstein–Rosen bridges may reflect a two-directional structure of time that preserves information and hints at a pre–Big Bang universe.

That creates a paradox – to find out more, we’d need observations of real wormholes, but to observe them we’d need to find out more so we know what to look for. Computer simulations can help break the ...

Heisenberg’s uncertainty principle refers to the fact that we can know a particle’s position, and we can know its momentum — but we can never know or measure both simultaneously. Ever since the German ...