Particle Physics & Astrophysics

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Symmetry: Looking for Strings Inside Inflation

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?

Why are there three almost identical copies of each particle of matter?

Observations of this kind could lead scientists to the source of ultra-high-energy cosmic rays.

Physicists discovered one type of Higgs boson in 2012. Now they’re looking for more.

Our universe could be just one small piece of a bubbling multiverse.

Explore the elementary particles that make up our universe.

The ATLAS and CMS experiments at the LHC see something mysterious, but it’s too soon to pop the Champagne.

What are WIMPs, and what makes them such popular dark matter candidates?