As the universe expands, it feels like it must be spreading out from some initial point. But a physicist explains why that’s ...

Might the universe we can observe be just half the tale, with a mirror universe moving in reverse through time filling out ...

Mathematical quirks of our universe have led some cosmologists wonder whether the cosmos was actually born in a black hole.

Dark energy—the term used to describe whatever is causing the universe to expand at an increasing rate—is one of the universe ...

What We Thought We Knew Dark matter has long been a cornerstone of modern cosmology, introduced to explain observed gravitational effects that cannot be accounted for by visible matter alone. Since ...

The Big Bang Theory is a popular sitcom that has kept us entertained with its quirky characters and scientific humor ...

The reason that teams on multiple telescopes in all different directions could hear this noise is that this annoying sound was actually the Cosmic Microwave Background (CMB)—radiation left over from ...

It might not be obvious to those of us only grappling with more mundane concerns, but for cosmologists bent on unlocking the universe’s deepest secrets, there’s no shortage of problems keeping them up ...

The accelerating expansion of the universe could be explained by modifying general relativity so that gravity has mass – or so thinks a small group of physicists. Matthew Francis reports What lies ...

For years, scientists have used a well-established model to explain how the universe evolves. The standard theory, called the Lambda Cold Dark Matter model (ΛCDM), is the prevailing cosmological ...

An artist's impression of how the very early universe (less than one billion years old) might have looked when it went through a voracious onset of star formation, converting primordial hydrogen into ...