mechanics

Four decades after its 1984 release, Tetris remains the gold standard of game design. Simple rules, infinite complexity, and addictive gameplay made it history's best-selling game.

At the equator, you're moving at 1,674 km/h because the Earth is rotating. You can't feel it. Here's the Newtonian mechanics and relativistic physics that explain why — and the real clues that reveal Earth's rotation.