Maybe in the future, humans will evolve to have larger and larger brains, and weaker bodies. We'll have huge heads and be incredibly smart, but have really flimsy arms and legs. We'll spend all our time hooked up to computers and machines and not have to exercise. Then we'll develop psychic powers to allow us to levitate and telekinetically move objects with our thoughts. We'll never have to walk or use any muscles, even to push buttons. Then, we will evolve into beings of pure energy. ...well, maybe not.
