Two studies fill in gaps about the cosmos’s ordinary matter. One maps it all, even the “missing matter.” The other details one of its hiding spots.

Despite decades of searching, scientists still haven’t found the elusive substance that holds galaxies together: dark matter.

Scientists say the phenomenon could “hint at” new particles or interactions between known particles that haven’t been ...

Gravity can exist without mass.” It’s a statement that upends a century of astrophysical dogma and, for some, sounds as ...

The first direct search for ultralight dark matter using a magnetically levitated particle has been conducted, according to ...

The idea of a particle that races faster than light has long fascinated physicists. Known as the tachyon, it was originally ...

A computational paradigm that can accurately simulate interactions between powerful laser beams and quantum fluctuations in a ...

Dark matter, although not visible, is believed to make up most of the total mass of the universe. One theory suggests that ...

But axions were pushed aside as the WIMPs hypothesis gained more steam. Back-of-the-envelope calculations showed that the ...

A festinating new theory shifts focus from space to time, arguing the clock-ticking we take for granted is richer and weirder ...

Inspired by superconductivity, a strange new theory that seeks to explain dark matter might explain dark energy, too ...

A physicist proposes that time has three dimensions instead of one, which could finally unite quantum mechanics and ...