2 thinkers, books, and ideas connected to this field.
Erich von Daniken's 1968 argument — that ancient monuments (pyramids, Nazca lines, Stonehenge) were built with extraterrestrial assistance — the founding text of the ancient astronaut genre — which sold 70M copies despite universal rejection by archaeologists.
A YouTube channel specializing in counterfactual historical scenarios — one of the most viewed channels in the alternative history genre, using animated maps to explore 'what if' historical questions.