Perhaps gravity’s oddest prediction is the existence of black holes: regions of space where gravity is so strong that nothing, not even light, can escape. Only through gravitational effects, such as by
When we look out at the luminous matter in the Universe — stars, galaxies, clusters of galaxies and the hot gas in and between them — it tells a couple of different stories. One is the story of how normal
The crystals' patterns repeat not in space, but in time. Crystals are structures in which a pattern of atoms or molecules repeats in space. Now, two teams of researchers have figured out that crystals'