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Science in 30 seconds
Science you can actually watch happen — in 30 seconds. These are the short explainers behind the simulations — watch the idea, then come back and play with it.
Latest explainers
Why airplane windows are round
Square windows once tore planes apart. Here's the physics.
Why your pen cap has a tiny hole
It's not a mistake — it's there to save your life.
A 1963 schoolboy found what scientists couldn't
The Mpemba effect: hot water freezing before cold.
Water has skin. Bugs know it. You don't.
Surface tension, and why insects can walk on water.
You've been watching lightning wrong
The bolt you see travels the 'wrong' way.
Electrons are slower than snails
So why does the light turn on instantly?
How Einstein built Google Maps
GPS would be useless without relativity.
Why super glue sticks to your fingers
...but not the inside of its own bottle.
Why "cold" doesn't actually exist
You can't add cold — only take heat away.
Why you look worse in photos than mirrors
Your brain has been lying to you all along.
Don't just watch it — play with it
Every video has a hands-on version. Move the sliders, break the rules, and see the science react in real time.
Explore 190+ simulations