Drag the thing.
Feel the law.
This site is for the questions you've had since you were five. Why is the sky blue? How can one rope lift a piano? Where does the Moon's missing piece go? You'll find answers here, but mostly you'll find little machines you can play with until the answer feels obvious.
One page, one question, one machine
Every page is built around a working model of the thing it explains. We call them plates, like the numbered figures in old reference books, except these ones move when you grab them. Drag the sun down to the horizon and the sky does a sunset for you. Pull on the pulley and you can feel the deal it's offering. The writing on each page is there to back up what you just saw. Not the other way around.
Every answer, written twice
There's a switch on every page: Like I'm 8 and The full picture. Flip it and the whole page rewrites itself. Same question, same simulator, two depths. Kids get a real answer in plain words. Adults get the actual physics, equations included. A tip: read the simple version first even if you know the subject. If it surprises you, the full version will land better.
House rules
Three of them. The physics is real: every plate runs the actual model, trimmed down but never faked, so what you learn here holds up later. Pages are named after the question you'd actually ask, not the chapter heading it would sit under at school. And everything is free. No accounts, nothing to install, nothing watching you read.
Where this is going
The list has two hundred questions on it so far, sorted by how often people actually ask them. After the school staples, that means your body, the weather, animals, and the machines around your house. New pages ship a few at a time, and a page doesn't ship until it's worth sending to a friend.
Pick a question you've always wondered about. The machine is already running.