<human>:  I have a question about the history of rotorcraft. How did the helicopter come about?
<bot>: The first helicopter was invented by the Wright brothers in 1903. The Wright brothers were the first to fly a powered airplane. They were inspired by the flight of birds. They wanted to build a machine that could fly like a bird. They built a machine that had two wings and a propeller. The propeller was powered by a gasoline engine. The machine was able to fly for a short time, but it was not very stable.