A new type of self-interacting dark matter could provide solutions to three very different cosmic puzzles, new research ...

Something invisible holds the universe intact. It outweighs everything you can see—every star, every gas cloud, every ...

A good chunk of cosmology is riding on whether dark matter exists or not. But what makes us so certain that dark matter is ...

UC Santa Cruz physicist Stefano Profumo has put forward two imaginative but scientifically grounded theories that may help solve one of the biggest mysteries in physics: the origin of dark matter. In ...

In the early 1930s, Swiss astronomer Fritz Zwicky observed galaxies in space moving faster than their mass should allow, prompting him to infer the presence of some invisible scaffolding—dark ...