The stuff about the north and south poles reversing is not just credible - it's generally regarded as inevitable, because it's already happened at irregular intervals ever since the earth was born. And although I'm not a scientist, I can imagine that it might reverse tidal flows and melt the ice caps and suchlike. (It would also knock out the internet faster than Fastly.
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But mixing that stuff up with bronze age mythology like Noah's flood is a bit of a stretch. For one thing, the last pole reversal was 780,000 years ago, and it may have taken 20,000 years to complete. With or without the assistance of visiting aliens.
But then, aliens were a big thing in the 1960s. Erich von Däniken ("Was God an Astronaut?") got the age of Aquarius spinning with the idea of spaceship landing strips in central America - although actually it looks as though they could have managed quite well without them anyway. (
https://www.amazon.co.uk/Chariots-Gods- ... 0285629115 ). By the time von Däniken died, he was discredited but filthy rich, and he barely even bothered to deny any more that the whole thing had been intended as hokum for the flower-power era.
Take a few genuine ancient mysteries, add in a few geophysical certainties, and spice it up with a bible story or an ancient Indian saga, and you've got a surefire winner. Personally, I wouldn't Adam and Eve it.
BJ