Interactive Explainers

Grant Sanderson's maths lessons, plus the written versions of the animations that made linear algebra look like geometry.

Engineering essays with live diagrams you drag — gears, lenses, GPS, sound — each the clearest thing ever written on its subject.

Maths explained by intuition first and formulas second, by someone who clearly resented how he was taught it.

Machine learning journal where every paper is an interactive diagram; publication has stopped, the back catalogue has not aged.

The hub for playable posts — effectively the index for the entire genre of learn-by-fiddling essays.

Every part of a wristwatch exploded and animated in sequence, until the escapement finally makes sense.

Neal Agarwal's collection of one-idea interactive toys, from spending Bill Gates' money to scrolling the whole ocean floor.

Drag mildly biased shapes around a grid and watch a segregated neighbourhood assemble itself without anyone intending it.

A quantum computing textbook with spaced repetition built into the page, so what you read has a chance of staying.

Amit Patel's tutorials on pathfinding, hexagonal grids and noise, with every parameter exposed as a slider you can ruin.

Brown University's visual introduction to probability and statistics, one animated chapter per concept.

Short visual explanations of statistics ideas — eigenvectors, conditional probability, Markov chains — all draggable.

Jay Alammar's diagram-by-diagram walkthrough of the architecture underneath every modern language model.

Visual essays answering questions nobody commissioned, like which pop lyricists have the largest working vocabulary.

Very long illustrated essays on artificial intelligence, procrastination and the Fermi paradox, drawn in deliberately bad stick figures.