The roots of Russia's invasion of Ukraine go back decades and run deep. The current conflict is more than one country fighting to take over another; it is — in the words of one U.S. official — a shift ...

The leaders of several AI companies called for new safeguards over the weekend. Here are three things government could do.

A modern WCA speedcubing timer. Official random-state scrambles for every WCA event, real competition inspection, trainers with per-case stats, an alg trainer for seven puzzles, a reconstruction ...