Every time I write about particle physics, I encounter a moment of uncertainty about a quantity that, at first glance, ought to be clear. How many kinds of elementary particles should I say there are?

In the mid-noughties, when music by the Killers and Franz Ferdinand blared out of every pub and nightclub I passed, I spent my days and nights struggling through a Ph. D.

Looking for help with today's New York Times Pips? We'll walk you through today's puzzle and help you match dominoes to tiles ...

A Lean 4 formalization of basic quantum computing definitions. It is a Lake/mathlib4 project and starts with a small core API for finite-dimensional complex matrices, state vectors, common qubit ...

(see the manual for information about the { mappings = true } part).

To help mark the passing of former Federal Reserve Chairman Alan Greenspan, we run this 2001 piece from Dr. Joseph Salerno, who understood the Greenspan fraud long before "The Maestro" tanked the US ...