Moving Diagrams
YouTubeHard ideas,
made visible.
Interactive explainers on science, maths and how things work. Play with the simulations, or watch them as short videos. Every number is sourced.
6 explainers
Physics · 6 min
Your phone runs on Einstein
Why the blue dot on your map would be kilometres off by tomorrow without relativity.
Biology · 7 min
The two-stroke engine in your chest
How a fist-sized muscle times every beat with its own electrical system.
Astronomy · 7 min
Where light goes to bend
Why the first picture of a black hole is a glowing ring, not a black dot.
Earth · 4 min
Why the sky is blue
Move the sun, thin the air, bend the physics, and watch the sky change in real time.
Mathematics · 5 min
Compound interest
Grow $100 for 30 years, find Bernoulli's number, and run Benjamin Franklin's 200-year bet.
Astronomy · 5 min
Solar eclipses
Drag the Moon over the Sun, find out why it fits so exactly, and follow the shadow of 2 August 2027 across Spain and Egypt.