Actually learn something: 201 sites

Fly out through our stellar neighbourhood, one star at a time

Slide tiles, double numbers, lose an hour to one more go

Grant Sanderson's maths lessons, with the visuals inline

Windows 98 rebuilt in JavaScript, down to the fonts

Everything about the curve behind every vector graphic

The flight tracker that filters nothing out of the sky

One long essay a day, on the questions without answers

The sky atlas professional astronomers use, in a tab

Browse by genre, mood, decade or who played on it

Type your address, watch it drift 750 million years

Machines taken apart in animation, layer by layer

Two anonymous models answer, you pick the winner

Read tomorrow's physics papers before they're published

Which asteroids would pay for the trip out to reach them

One space image a day, explained by a working astronomer

A guidebook to the places no guidebook mentions

Filter by genre, format and location, then simply listen

The best interactive explainers anyone is making

A chiptune sequencer that fits a whole song in a URL

The etymology and history of first names, worldwide

Maths taught as intuition first, notation afterwards

Every natural history book, scanned by the world's museums

Weather radar, counting the birds that migrate overnight

Three rules are all a flock of birds needs

An 1847 geometry book where colour replaces the labels

The American statistical record, queryable directly

The chatbot that made everyone else build a chatbot

Click a grid of squares and it becomes a melody

A world map where every pin is a field recording

Anthropic's assistant, strongest on long documents

Play with the models behind epidemics, flocks and chaos

Sixteen words, four secret groups, four mistakes allowed

Four rules, and cells that build spaceships anyway

Watch one nest from first egg to first flight

What happens between typing a command and seeing output

A weekly note listing five datasets you can have