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

The universe exists because matter and antimatter are not good friends. Is there a scientific reason why the universe exists?

The fate of the cosmos may be a bit different than previously expected. For years, scientists have talked about how the universe is always expanding — constantly moving outward, never stopping.

About a century ago, scientists were struggling to reconcile what seemed a contradiction in Albert Einstein’s theory of general relativity. Published in 1915, and already widely accepted worldwide by ...

Here’s a mind-blowing thought: what if our entire universe is actually inside a black hole? Some scientists think it’s ...

A new hypothesis from physicists at the University of Portsmouth in the U.K. challenges the long-standing Big Bang Theory as the ultimate origin of the universe. This new “Black Hole Universe” ...

The history of the universe always feels hard to fathom. After the Big Bang, it is believed that the universe was filled with hot gas and light. Eventually, matter started to cool down, and the first ...

Seconds after the Big Bang, the newborn universe gave rise to the first elements—ionized forms of hydrogen and helium. These particles combined, forging helium hydride—the first ever molecule. It ...

Ten years after the first gravitational wave detection, a new suite of instruments has captured distinctive ringing signals ...

A University of Colorado Denver engineer is on the cusp of giving scientists a new tool that can help them turn sci-fi into reality. Imagine a safe gamma ray laser that could eradicate cancer cells ...