13 June 2023
A few months ago, the James Webb Space Telescope spotted six early galaxies that were so large they threatened to break our best theory of how the cosmos evolved. Did they?
24 May 2023
Researchers are building models of everything from black holes to the big bang in tanks of liquid. Now some claim these surprisingly simple models are showing us where our theories of space-time are wrong
3 May 2023
The holographic universe theory still grips physicists 25 years since it was first published. Here’s what it is all about
22 April 2023
An abridged inventory of everything there is in the universe – from rogue planets and exomoons to supernovae, supermassive black holes and the cosmic web.
27 March 2023
Primordial black holes older than the big bang could rewrite cosmology by providing evidence for a previous universe. It's a wild idea, but some physicists think we've got a chance of finding them
15 June 2022
The universe might meet its end in a big freeze, a big crunch, or a big rip. But whether time ends with the demise of the cosmos depends on whether it is even real after all
11 May 2022
For decades, measurements of the universe's expansion have suggested a discrepancy known as the Hubble tension, which threatens to transform cosmology. But a new method suggests the tension may not exist after all
30 December 2020
How big is the universe? What shape is it? How fast is it expanding? And when will it end? We answer these questions and more in our essential guide to the current state of cosmological knowledge
9 December 2020
The point when you began depends on the scale you look at and how you define a person – in one sense you’re as old as the universe, in another you’ve hardly begun at all
22 July 2020
A century ago, we missed the loose threads that told us our picture of the universe would unravel. Let’s not be so complacent now, says cosmologist Dan Hooper
