Aliens could explain anything. Unhappy with your government? Infiltrating aliens with mind control explain why they raise our taxes. A ship disappears in a clear sea? An alien mothership can levitate a ship of any any size to use for its raw materials. A girl disappears, nuclear weapons are suddenly disarmed, a car conks out on a lonely road, a traveller cannot account for four hours on the road. All these things and more can be attributed to aliens.