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
10 January 2023
If we can’t measure something, we can’t know its true nature. This fundamental limitation hampers our understanding of the quantum world – but it doesn't preclude scientific thinking
23 November 2022
Supermassive black holes that beam powerful jets of matter towards Earth, known as blazars, accelerate particles to extraordinarily high energies – and astronomers have finally figured out how
22 September 2021
Black holes devour stuff and then shrivel away over billions of years. Explaining what happens to anything that falls in explodes our current theories of physics, says cosmologist Paul Davies
28 October 2020
What happens to matter in a black hole? The question has spawned many paradoxes, and in an extract from his latest book, physics superstar Carlo Rovelli proposes an answer
29 January 2020
It’s the ultimate scientific quest – to understand everything that there is. But the closer we get, the further away it seems. Can we ever get to grips with the true nature of reality?
16 April 2019
From wormhole passages to white hole escape routes, no one knows for certain what lurks beyond a black hole’s event horizon – so choose your own unsettling fate
12 December 2018
White holes are black ones in reverse, spewing out matter– and they could give us our first glimpse of the quantum source of space-time, says physicist Carlo Rovelli
