The possibility that there might be many parallel worlds has just become a little more likely.

Why are physicists unsure about what it means to say that something has happened? Anthony Aguirre and Sean Carroll explain.

Some general ideas in very few words and without equations.

Why did physicists at the beginning of the 20th century feel they needed a new — and strange — theory?

Here's a quick introduction to the most famous cat in the history of science. We hope it whets your appetite for quantum mechanics!

A very strange way of explaining away the strangeness of quantum mechanics.

To mark national cat day, here's a quick look at the most famous cat in the history of science: Schrödinger's cat.

At the heart of modern physics lurks a terrible puzzle: the two main theories that describe the world we live in just won't fit together.

A closer look at one of the simplest quantum algorithms.

Quantum computers often grab the science headlines. But what exactly is quantum computing? What will quantum computers be able to do, and when can we expect to have fully functional ones?