Physics

A simple and elegant way to stack identical flat objects so that they project over an edge as far as possible.

The effort to unify quantum mechanics and general relativity means reconciling totally different notions of time.

A proposed theory of gravity does away with dark matter, even as new astrophysical findings challenge the need for galaxies full of the invisible mystery particles.

How do physicists reconstruct what really happened in a particle collision? Through calculations that are so challenging that, in some cases, they simply can’t be done. Yet.

What formula describes the farthest you can stack flat blocks over the edge of a table to form a seemingly gravity-defying half-bridge to nowhere?

An unexpected connection has emerged between the results of physics experiments and an important, seemingly unrelated set of numbers in pure mathematics.

So-called “analogue experiments” are becoming increasingly common in physics, but do they teach or mislead?

Can a fluid analogue of a black hole point physicists toward the theory of quantum gravity, or is it a red herring?

A new theory explains how fragile quantum states may be able to exist for hours or even days in our warm, wet brain. Experiments should soon test the idea.