Forces have mediator particles. Electromagnetism is mediated by the photons, for example. So most of the decay of this excited dark matter particle would be this unknown mediator. The excited state ...

This video explores the enigma of dark matter, an elusive substance believed to make up most of the universe's matter. While the universe is populated by visible stars and galaxies, much of its mass ...

Cosmic voids may seem like the emptiest places in the universe, stripped of matter, radiation, and even dark matter. But they’re far from nothing. Even in these vast empty regions, the fundamental ...

Using the 10-meter Hobby-Eberly Telescope in the US, astronomers have detected a subtle, hidden glow from 9 to 11 billion ...

Astronomers have created an enormous 3D map of the universe revealing a glowing “sea of light” from hydrogen gas during the cosmic dawn nearly 11 billion years ago.

Michael S Turner argues that the next breakthrough in particle physics and cosmology may be just around the corner.

In recent months, Ireland became an associate member of Cern, the European Organisation for Nuclear Research. This is a very welcome development for physicists, engineers and computer scientists ...

Cosmic voids are different. These vast expanses contain very little matter. In such places, the vacuum of space-time itself becomes the dominant component. If you were positioned at the center of a ...

Last year, our most detailed map of the universe yet suggested our understanding of dark energy has been wrong for decades. The shock result is reigniting the search for a better cosmic story ...

Physicists are scrambling to understand why dark energy is weakening. In a surprising twist, we must now reconsider the ...

After 25 years of planning, six years of data collection, and six more years of analysis, scientists have published a portion of the final results of the Dark Energy Survey (DES) — the largest, most ...

David Joffe receives funding from NASA through a grant from the Georgia Space Grant Consortium. Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer ...