Human/ Future Human Hypothesis
The Human hypothesis indicates that UFOs were created by humans.
Two possibilities are considered: UFOs are secretive, undisclosed technology made by the military, inventors, or foreign adversaries. Or, they are created and inhabited by "Future humans."
Some anthropologists have indicated that our history with technology and ingenuity goes back a very long time (see also: ancient civilizations).
Some suggest that there may be human civilizations that remain undiscovered.