Observations of dwarf galaxies around the Milky Way have yielded simultaneous constraints on three popular theories of dark matter.

Just like we orbit the sun and the moon orbits us, the Milky Way has satellite galaxies with their own satellites. Drawing from data on those galactic neighbors, a new model suggests the Milky Way should have an additional 100...

If a particle has no mass, how can it exist?

The approach could advance our understanding of fundamental forces under extreme conditions with applications from astrophysics to fusion research.

The event attracted 124 participants and explores the successes and challenges of the theory that describes subatomic particles and fundamental forces.

Nearly 200 guests attended a symposium on fundamental physics to celebrate the former deputy director’s numerous scientific contributions, which continue to have a tremendous impact on our understanding of the subatomic world.

The prestigious award recognizes her seminal contributions to particle physics.

Constellations illustrates the many-worlds interpretation of quantum mechanics—with a love story.

A unique groundbreaking ceremony marked the start of construction of the Long-Baseline Neutrino Facility – future home of the Deep Underground Neutrino Experiment, which promises to shed new light on how the universe works and why matter exists.

How did the proton, photon and other particles get their names?

H. Pierre Noyes, the first director of SLAC's Theory Group, died in Stanford on Sept. 30, 2016, at age 92. Noyes, a theoretical physicist, leaves behind a legacy of distinctive academic work and activism.

How can we measure the worth of scientific knowledge? Economic analysts give it a shot.