Extraordinary claims require extraordinary evidence,” Carl Sagan once warned a maxim now resonating through telescopes worldwide as astronomers grapple with a mind-bending new discovery. The James ...

In one new theory, it is possible that dark matter exists in a mirror universe where there are only dark versions of forces ...

When we experience the world, we believe it’s an accurate reflection of reality. But what if it’s all an illusion? From the ...

Matter-antimatter asymmetry puzzles physicists. Learn how the Deep Underground Neutrino Experiment (DUNE) may find answers.

The first chemical reactions in the wake of the Big Bang have been recreated for the first time in conditions similar to ...

The new measurement from LHCb has found differences between baryons and antibaryons, which are made of three quarks and three ...

UC Santa Cruz physicist Stefano Profumo has put forward two imaginative but scientifically grounded theories that may help ...

That cosmologists cannot agree on one of the most elementary facts about the universe is striking enough. But that ...

The universe is a very intriguing and still mysterious thing. And pinning down exactly what dark energy is, and how it behaves, is going to be paramount to understanding how the universe might end.

Fast radio bursts (FRBs) last around a millisecond and in doing so encode otherwise unattainable information on the plasma ...

A backward, mirror universe could explain the existence of dark matter. If an anti-universe exists, it would run backward in ...

Astronomers have discovered the most monstrous supermassive black hole ever. At 36 billion times more mass than our sun, it’s so big it’s pushing back the boundaries of possibility. They’ve even had ...