The origin of our Universe remains one of the greatest enigmas of science, a question that seems to defy the limits of our physical understanding. For decades, cosmologists have struggled with the ...

Asking what existed before the Big Bang is often dismissed as meaningless, since traditional physics breaks down when pushed that far back in time. Yet a new paper published in Living Reviews in ...

The early universe was already warm before reionization, revealing that the first stars did not flicker on in an icy cosmos.

Here’s what you’ll learn when you read this story: A backward, mirror universe could explain the existence of dark matter. If an anti-universe exists, it would run backward in time, before the Big ...

Even before the first stars lit up the Universe, the Cosmos was not the cold place most researchers once imagined. New ...

If recent discoveries that dark energy is evolving hold any water, our Universe will collapse under its own gravity on a ...

We know how the universe began. An event we call the Big Bang started it all about 13.8 billion years ago. How the universe ...

Most cosmologists believe that these stars were the first large, free-floating structures to illuminate our universe, and ...

Astronomers examining data from the James Webb Space Telescope say they’ve spotted what might be the oldest black hole in the universe, born less than a second after the Big Bang. Their findings, ...