Physicists are quietly testing wild new theories that treat a hidden fifth dimension as more than science fiction, suggesting it could steer how gravity, dark matter and even cosmic history unfold.

Physicists know that something unseen is sculpting the cosmos, outweighing ordinary matter by roughly a factor of five, yet every detector built so far has come up empty. One of the most audacious ...

Dark matter could be the result of fermions pushed into a warped fifth dimension. This theory builds on an idea first stated in 1999, but is unique in its findings. Dark matter makes up 75 percent of ...

"If such a fifth force exists, it cannot exceed 7% of the strength of gravity." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Breaking space ...

For a long time, scientists have been chasing something they cannot see. It doesn’t glow, it doesn’t shine, and it never shows up in photos. Still, they are convinced it is everywhere. Some jokingly ...

Dark matter may be invisible, but scientists are getting closer to understanding whether it follows the same rules as everything we can see. By comparing how galaxies move through cosmic gravity wells ...