Mathematician Offers New Solution to a Fundamental Cosmic Paradox
A thermodynamic analysis of spacetime also points to an unexpected role for emergent dark energy and hints that…
Quantum Gravity May Be Far Less Quantum Than Physicists Expected
Physicists have long assumed that uniting quantum mechanics with gravity would require spacetime itself to behave quantum mechanically.…
Meet Sabrina Pasterski: Stephen Hawking cited her, NASA wanted her, but she chose physics
Most children dream of flying a plane. Sabrina Gonzalez Pasterski built one. By the time she was 14,…
Time may be an illusion derived from quantum entanglement
Time has always seemed like the one thing physics could count on. Matter changes, stars die, particles flicker…
Wormholes may enable time travel, astrophysicists find
A ring in space, at least on paper, can do something a black hole cannot. It can connect…
‘Mini Universe’ built from ultracold atoms measures time without a clock
A trapped cloud of ultracold atoms, colder than almost anything found in nature, has become the setting for…
24,000-atom mini universe demonstrates time flow without a clock
What if time isn’t woven into the fabric of reality at all? A new experiment suggests that the…
New discovery rewrites what we know about the speed of light
The speed of light remains one of physics’ firmest assumptions, but scientists still test whether it ever shifts…
One of the Largest Physics Surveys Ever Finds No One Agrees on Anything
Last summer, Nature conducted a survey asking physicists about some quantum hot takes. That venture revealed significantly disparate…
Black hole GW190521 may be a wormhole from another universe
For just one-tenth of a second in May 2019, the universe delivered a signal that did not fit…
Historic discovery shows atoms can exist in two places at once
A cloud of helium atoms split, scattered and fell under gravity, yet still behaved as if its parts…
Physicists propose tweak to Einstein’s relativity that could transform our understanding of the Big Bang
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