How Things Work

The everyday science and engineering hiding in plain sight — from the code in your wallet to the contrails over your head.

QR codes look like random black-and-white noise, but every square in the pattern has a job. Here's how they…

Contrails aren't smoke or fuel exhaust — they're a cloud your plane makes in real time. The actual physics,…

Test what you know

See how well you actually understand this stuff with a quick, free quiz.