Cosmology

Physicists have new ideas about why the energy of empty space is so much weaker than it is predicted to be

Large galaxies are thought to form gradually, across billions of years of cosmic time. So why do astronomers keep finding them in the youthful early universe?

Astronomers can’t understand how distant galaxies grew so big so fast

New evidence from neutrinos points to one of several theories about why the cosmos is made of matter and not antimatter

But more data are needed before physicists know for sure

Gravitational waves attributed to the collision of two neutron stars could have been produced by something much stranger

The theory, which emerged in the 1970s as a way to unify the fundamental forces of nature, has profoundly shaped the landscape of particle physics

Physicists attempting to unify the theories of  gravity and quantum mechanics have long thought practical experiments were out of reach, but new proposals offer a chance to test the quantum nature of gravity on a tabletop

Stemming from the “F-theory” branch of string theory, each solution replicates key features of the standard model of particle physics

Flickers of light from the edge of the cosmos help physicists advance the idea that the future is not predetermined

Some physicists claim that the popular landscape of universes in string theory may not exist

Hundreds of researchers in a collaborative project called “It from Qubit” say space and time may spring up from the quantum entanglement of tiny bits of information