Scientists have many big questions to tackle about the universe, including how big it actually is. But even the proposed answers aren't straightforward.

After a century of observations spanning the breadth of the cosmos and theoretical insights that push humanity's vision of the universe to its utmost limits, we can finally, confidently say that the ...

Whether the universe will "end" at all is not certain, but all evidence suggests it will continue being humanity's cosmic ...

The following is an extract from our Lost in Space-Time newsletter. Each month, we hand over the keyboard to a physicist or mathematician to tell you about fascinating ideas from their corner of the ...