Cosmic voids look empty but they may be tearing the universe apart

Imagine removing everything from the deepest regions of cosmic voids. Take away ordinary matter, neutrinos, dark matter, cosmic rays, and radiation. What remains appears to be nothing but empty space. It may sound contradictory, but these enormous voids are filled with the vacuum of spacetime. And importantly, that vacuum is not truly nothing.

1. Homepage
2. Science
3. Cosmic voids look empty but they may be tearing the universe apart