The first evidence for dark matter were galaxies that behaved as if they had far more matter than could be accounted for by the mass of their stars. Since then, we've found many other indications that ...

Astronomers using data from NASA’s Hubble Space Telescope have observed what appears to be a clump of dark matter left behind from a wreck between massive clusters of galaxies. The result could ...

A simple explanation of dark matter and antimatter, how they differ, how scientists study them, and why both are important to understanding the universe.

The Dark Forest theory is one proposed solution to the famed Fermi Paradox, which has bewitched astronomers for more than half a century. To put it concisely, the paradox asks if the cosmos is nearly ...