Live lessons in the history of science
How does anything really work?
Don't watch it. Pull it, tap it, and guess before you are told. Each live lesson is a small world drawn in code, built around one question someone once dared to ask.
Magnified illustration · outer ring 2000 BC, centre today
How a live lesson works
Guess. Pull. See why.
- 01
Guess
Before anything is explained, you make a call. Most people guess wrong. That is the point.
- 02
Pull
Drag, tap and break the world. It answers back with every move you make.
- 03
See why
The answer arrives as something you just did, not something you were told.
Start here
Live now.
Pick a question. A few minutes later you will know why, because you did it. Every lesson is free to open, no account needed.
The map
Five branches. One long tail.
Every one of the 428 questions has its own lesson, in the order people answered them. 2 are live lessons already; the rest are on their way.
Plans
Keep asking.
OneLongTail Unlimited
Every lesson and every exercise, with no daily limit. New lessons as they land.
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100 classic math and logic puzzles in large print, each with a full worked answer. Printable PDF.
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New lessons, free, in your inbox.