Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

Within the grand bookkeeping system of the universe’s timeline, the universe’s ultimate demise has always appeared as an ...

Most people have never heard of vacuum decay, but if it happened it would be the biggest natural disaster in the universe. Sure, an asteroid could destroy a city or wipe out life on Earth. A supernova ...

Our universe plays by certain rules, which originate from different branches of physics. But sometimes the rules seem ...

Hardy's paradox, created in 1992, hinted at a scenario haunting the edges of quantum physics. It presented a thought ...

To progress to the next level in understanding reality, we need to combine quantum mechanics and Einstein’s general ...

Try as they might, scientists can’t truly rid a space or an object of its energy. But what “zero-point energy” really means ...

Would it be possible to control and even reverse the flow of time in a laboratory setting? While taking a trip back through ...

The early universe experienced a phase of rapid expansion, known as inflation. For decades, cosmologists assumed that this expansion was powered by a new entity in the universe, known as the inflaton.

Nearly 50 years ago, physicists floated a bold idea: our universe might be stuck in a false vacuum. This state feels stable, but deep down, it's not. Over enormous timescales, it could suddenly tip ...

When it comes to understanding the universe, what we know is only a sliver of the whole picture.

The coldest and densest molecular gas clouds in the interstellar medium can have temperatures of 10 K (-505 °F/-263 °C), ...