Inventions can change the world in an instant. Inventions are thought of every minute but very few of them actually make it to market. In this section we'll examine amazing inventions from all throughout history.
How Newton’s Cradles Work
Five metallic balls on slender threads sit side by side. As one on the end hits the rest, the one on the opposite end rises and falls. Why don't the balls in the middle move? It's complicated.