Physics

Say goodbye to stable orbits and knotted shoelaces.

The contest between gravity and quantum physics takes a new turn.

At small scales, gravity seems to blow up—but not if space becomes 1-D.

There is no known physics theory that is true at every scale—there may never be.

From steam to ice, water continues to mystify.

The intricate compatibility of water and life on Earth may not extend to other planets.