Reports of strange encounters with mysterious beings and objects have occurred throughout history. A book from the 13th century recounts a story of a creature descending in a flying craft over Bristol, England and Christopher Columbus saw strange lights.
Antarctica is Earth's most remote continent - but satellite imagery has revealed what appear to be the tops of man-made pyramids. Alien Astronaut theorists suggest that an ice-free Antarctica may have been colonized by extraterrestrials in the past.
Transhumanists envision a future in which we become cyborgs, achieving far superior intelligence and the possibility of immortality. Ancient Astronaut theorists suggest superhuman beings have walked the Earth before.