We’re still not sure exactly what dark energy is, but it may have played a key role in the early universe. The resulting dilemma is called the Hubble tension, and Niedermann and Sloth say they may ...

Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that ...

Scientists propose a gravitational-wave method called the stochastic standard siren to measure the Hubble constant, offering an independent way to examine the universe’s expansion and the Hubble ...

Repulsive gravity at the quantum scale would have flattened out inhomogeneities in the early universe First light The cosmic microwave background, as imaged by the European Space Agency’s Planck ...

The following is an extract from our Lost in Space-Time newsletter. Each month, we dive into fascinating ideas from around the universe. You can sign up for Lost in Space-Time here. “In the beginning” ...