The Early Universe
Theorists from the Institute for Advanced Study have proposed a way forward in the quest to test string theory.
Exploding stars have an immense capacity to destroy—and create.
How can we figure out when the universe began?
Citizen scientists dive into particle physics and astrophysics research.
After more than six years of grinding and polishing, the first-ever dual-surface mirror for a major telescope is complete.
Cosmic inflation refers to a period of rapid, accelerated expansion that scientists think took place about 14 billion years ago.