In 1903, Orville and Wilbur Wright flew the first plane in Kitty Hawk, North Carolina. Their plane looked quite different than the ones you fly today. It was made of wood and cloth, and there were no seats inside a cabin—the pilot, who was the only person on the plane, had to lie flat on the wing, completely out in the open! Luckily, that plane didn't fly very high or far. Today, most planes are made out of metal, and passengers sit safely inside an enclosed cabin. Planes usually fly about seven miles high in the sky, and the biggest ones can reach halfway around the world! But despite the differences between the first plane and today's modern ones, they both use the same science to fly. Here's how they work.