An Unientified Flying Object, or UFO, is any apparently flying object that cannot be identified. Various studies show that after investigation, the majority of UFOs are usually identified (see Identified flying object). The most recent statistical study of UFO reports determined that upwards of 98.5% of all UFOs were identifiable and attributable to known artificial objects and natural phenomena. Nevertheless, most discussions of UFOs focus on the belief that they are extraterrestrial spacecraft. There is no scientific evidence supporting this belief.