Everything we see around us, from the ground beneath our feet to the most remote galaxies, is made of matter. For scientists, that has long posed a problem: According to physicists’ best current ...

A mysterious glow of gamma rays at the center of the Milky Way has long hinted at dark matter, but the lack of similar ...

Dark matter is some kind of substance that has gravity—it holds galaxies together—yet cannot be directly seen with any ...

Learn how a two-state model of dark matter could explain why gamma-ray signals appear in some galaxies but not others.

Scientists say they can explain dark matter by positing a particle that links to a fifth dimension. While the “warped extra dimension” (WED) is a trademark of a popular physic ...

Scientists have proposed a new theory suggesting that dark matter, one of the universe’s biggest mysteries, may exist in a hidden fifth dimension. In a ...

CHICAGO (CBS) -- A powerful new particle accelerator that could be set up at Fermilab, a telescope to observe the oldest light in the universe, and research to learn more about mysteries such as dark ...

Crucially, physicists haven’t been able to think of any such process that would mesh with today’s leading theory of matter and energy, known as the Standard Model of particle physics. That leaves ...