Do you believe in ALIENS?

Aliens are from the other world or universe that are so smart, they are not human like us but. They have there super brains more that human brains. Aliens are GREY looking and there heights are rational, they have a big head, 3 fingers, skinny body, and a big eyes. 

Aliens are visiting Earth since it was still forming until now. They have the vehicle that we don't know yet how they made it, it was called by us as a UFO. UFO is the vehicle of an alien that can travel through stars and can travel so fast, faster than the light.