Curious about
how things
actually work?
Plain-English explainers on technology, finance, science, and the hidden systems running everyday life. No jargon, no fluff.
Sample explainer
Featured explainers
How Self-Driving Cars Work
A self-driving car processes more data every second than a human brain handles in a day. And it still struggles with a plastic bag.
How Traffic Jams Form
Traffic jams can appear on completely clear highways with no accident, no road work, and no obvious cause, just too many cars reacting to each other, and a phenomenon that travels backward down the road like a wave.
Latest explainers
How Ultrasound Imaging Works
When a technician presses a probe to your abdomen and a blurry image of a fetus appears on a screen, you are watching physics invented in 1880 do something its creator never imagined. Here is how sound waves became the most versatile eye in medicine.
How Solar Panels Work
The sunlight hitting your roof right now contains enough energy to power civilization several times over. Solar panels are the devices that capture it.
How Septic Systems Work
About 60 million Americans rely on a hidden underground system to treat their household wastewater. Most have never thought about what happens after they flush.
How GPS Works
Your phone knows exactly where you are on Earth, down to a few meters. The system that makes this possible involves 31 satellites, Einstein's relativity, and atomic clocks ticking at the speed of light.
How QR Codes Work
The unassuming grid of black and white squares you scan with your phone hides an elegant system of redundant data, error correction, and decades of Japanese engineering.
How Virtual Memory Works
Your computer is running 50 browser tabs, a music player, and three code editors. None of those programs actually have enough RAM to fit. Virtual memory is the trick that makes this possible.