
Do We Live in a Simulation? Chances Are about 50–50
Gauging whether or not we dwell inside someone else’s computer may come down to advanced AI research—or measurements at the frontiers of cosmology

Do We Live in a Simulation? Chances Are about 50–50
Gauging whether or not we dwell inside someone else’s computer may come down to advanced AI research—or measurements at the frontiers of cosmology

Powerful New Observatory Will Taste Neutrinos’ Flavors
The Chinese JUNO experiment will aim to answer a mystery about the particles’ mass


This Twist on Schrödinger’s Cat Paradox Has Major Implications for Quantum Theory
A laboratory demonstration of the classic “Wigner’s friend” thought experiment could overturn cherished assumptions about reality

How Scientists Solved One of the Greatest Open Questions in Quantum Physics
The story of a macroscopic quantum system and a mathematical odyssey

Antimatter Discovery Reveals Clues about the Universe’s Beginning
New evidence from neutrinos points to one of several theories about why the cosmos is made of matter and not antimatter

Weird Neutrino Behavior Could Explain Long-standing Antimatter Mystery
But more data are needed before physicists know for sure

Will String Theory Finally Be Put to the Experimental Test?
Physicists have found a way the theory might limit the cosmic inflation that is thought to have expanded the early universe

The Coolest Physics You’ve Ever Heard Of
Ultracold atoms can simulate all sorts of quantum behavior

Hidden Passage: Could We Spy a Traversable Wormhole in the Milky Way’s Heart?
Anomalous motions of stars orbiting our galaxy’s central supermassive black hole might reveal the existence of long-hypothesized tunnels through spacetime

Supergravity Snags Super Award: $3-Million Special Breakthrough Prize
The theory, which emerged in the 1970s as a way to unify the fundamental forces of nature, has profoundly shaped the landscape of particle physics

Spin-Swapping Particles Could Be “Quantum Cheshire Cats”
A proposed experiment to swap fundamental properties between photons carries profound implications for our understanding of reality itself

Space: The Final Illusion
The intuitive idea that objects influence each other because they are in physical proximity is soon to become another of those beliefs that turn out to be wrong when we look deeper