In an unprecedented step, researchers crafted a detailed model compatible with the universe’s accelerated expansion.

Stop. Look around. All things, visible or not, are made of particles so tiny that many find their sizes difficult to comprehend. Far removed from our everyday experiences, they move at rapid speeds ...

Steve Giddings is a University of California, Santa Barbara string theorist. A provocative branch of physics called string theory might explain everything in the universe, such as how matter came into ...