There is a compelling hypothesis that a lost, advanced civilization existed during the Ice Age and was destroyed by a global cataclysm.

“it's often said that I'm claiming to have proved that there was an advanced Lost Civilization in the Ice Age and I am not claiming to have proved that that is a hypothesis that I am putting forward”

Atlantis was likely a parable created by Plato rather than a real location, though if a model for it existed, it could be the city of Akrotiri on Santorini.

“I don't think that Atlantis existed I do think it was one of Plato's many parables talking about you know putting it in an interesting story as a teaching device in his school if one did exist or a shadow of it my money would be on Acer aceri is what's left of a big city”

An advanced civilization existed in the remote past that was capable of large-scale megalithic construction before being largely wiped out by a cataclysm.

“the evidence for some Advanced civilization in extremely remote prehistory that was able to do some of these large megalithic anomalous projects all over the world and they just almost completely vanished because we know there was a massive destruction Extinction event and flooding event and multipl”

Advanced megalithic sites around the world show evidence of a global civilization that possessed sophisticated, lost capabilities and was wiped out by cyclical cataclysms.

“A global lost civilization that seemed to be sharing knowledge all around the world. All had connections to it and they were systematically destroyed and wiped out.”