'Ancient Aliens' Dr. Kaku Says New UFOs a Sign of Highly Advanced Aliens, Possibly

Dr. Michio Kaku -- one of the stars of "Ancient Aliens" -- says the U.S. government's admission of a UFO means there are top-secret military weapons in use ... or aliens way smarter than us are really here. The popular physicist tells TMZ ... the…

source https://www.tmz.com/2021/04/18/ancient-aliens-michio-kaku-ufo-extraterrestrial-advanced-flying-saucer/