Every memory leaves its own imprint in the brain, and researchers are starting to work out what one looks like.

Physicists' attempts to classify all possible phases of matter.

What makes a perfect croissant.

Why an old theory of everything is gaining new life.

An animated introduction to the Fourier Transform.

The revolutionary ideas of Thomas Kuhn.

Is evolutionary science due for a major overhaul – or is talk of ‘revolution’ misguided?

Texting in ancient Mayan hieroglyphs. What Unicode will make possible.

Do we live in four dimensions, as relativity theory says, or ten, as string theory claims? And what are dimensions anyway?

The stick is an unsung hero of human evolution. Even so, my vote goes to fire and the wheel.