Not to mention out-of-place artifacts (OOPARTS) and the like.
I first read Chariots of the Gods back around 1972 after having somewhat of a sheltered and “religious childhood, don’t ask questions where we gotta make up answers”.Other than the ancient alien theory, I have yet to come accross any other logical explanation.I guess that all started when , in parochial school, iwas told that dinasauers never existed and scientist and anthropoligist was just making that stuff up to pull people away from the bible.