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

A new theoretical study proposes a radical idea in the search for dark matter—using the surface of Ganymede, Jupiter’s ...

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

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 ...

Dark matter is one of the biggest puzzles in science. Although it makes up about 85 percent of all matter in the universe, it ...

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 ...

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

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.

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

For decades, astronomers have been trying to nail down the value of the Hubble constant—a measure of how fast the universe is expanding. But some cosmologists say there’s evidence that the universe is ...

One of his ideas, which he called the “participatory universe,” posits that our own observations could actually be what is creating our physical reality. The idea could be depicted in a ...