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
10 May 2023
In the search for a theory that unites general relativity and quantum physics, many have tried to rethink space-time. But what if space-time emerges naturally, like a hologram?
3 May 2023
The holographic universe theory still grips physicists 25 years since it was first published. Here’s what it is all about
21 November 2022
Algorithms can pore over astrophysical data to identify underlying equations. Now, physicists are trying to figure out how to imbue these “machine theorists” with the ability to find deeper laws of nature
14 September 2022
An experiment conducted on a satellite in orbit found that Albert Einstein's ideas about gravity are still correct, with measurements accurate to one part in a quadrillion
3 August 2022
Space-time isn't expanding into anything because general relativity is what we call a background independent theory. Chanda Prescod-Weinstein sets out to explain what this means
15 June 2022
Physicists have long sought to marry general relativity and quantum mechanics – now some reckon experiments that probe the way each theory treats time could finally make it happen
3 June 2022
A few particles of light bouncing off a flying mirror made of charged particles may reveal whether or not black holes destroy information, a famous problem in physics
3 March 2021
Previous ideas for warp drives have required types of matter that do not seem to exist, but a new concept could allow them to be made without any imaginary substances
31 August 2020
Most of the wormholes that could theoretically exist cannot be traversed, but adding an extra dimension makes it possible to make one you could pass through without dying
