Algodoo

It all started when a couple scientists where looking at stuff in microscopes, ya know, dust, polen, and so on. They noticed that stuff seemed to change direction without reason. Einstein had a crazy idea about this, he said that there were particles, like molecules or atoms, hitting the dust and polen and pushing it, causing it to change direction, he even made of math to prove that it was real! So Einstein prooved that there ARE particles everywhere, naming the newly discovered motion after the Guy who started it all, Robert Brown. Hence the name, Brownian motion!