Damn some of the comments here are really depressing. I'd formerly thought HN was one of the last bastions of critical thought on internet, but I guess I was wrong judging by some of these comments. Way too much regurgitation of long-since debunked pseudo-scientific nonsense.
Atlantis was never real and anyone who thinks it was is a moron.
If there were truly some sort of globe-spanning advanced civilization existing ~11KYA we'd have found at least one single piece of their material culture by now, but we haven't. We have however found innumerable pieces of archaeological evidence of contemporary hunter-gatherer neolithic societies in and around all of the places Atlantis was supposed to have "Conquered" and yet not once have we found a single Atlantean trade good, pot sherd, metal working, etc. Atlantis supposedly had a bronze-age or greater level of technology and a globe-spanning empire, and we literally haven't found a single shred of physical evidence to support its existence, despite having literal mountains of physical evidence for pretty much every other major empire that's existed throughout history.
Nor have we found any genetic evidence in people or crops that there was any kind of "Empire" connecting parts of Europe or Africa as we find time and time again with real empires that actually existed in prehistory. Real empires have people and crops that move around within the empire and leave genetic evidence of the mixing of populations and breeding of crops, yet we find nothing, not even the faintest echo of Atlantis. Again, we have mountains of hard physical evidence that shows how empires like the Summerians in the fertile crescent or the Norte Chico in meso-america spread through genetic evidence in current local populations and crops, yet we find absolutely no genetic evidence to support the existence of Atlantis.
Let alone the fact the bloody story of Atlantis references how the Atlanteans went to war with Athens some 9000 years before the Athenian city-state was even founded. Just utter, complete brain-dead nonsense.
Honestly, belief in Atlantis has become something a litmus-test for critical thinking and research ability these days, as anyone that believes in Atlantis despite the overwhelming volume of evidence that firmly proves it never existed is basically saying "I'm too lazy to do my own research (Based on peer-reviewed primary sources) and / or too stupid to understand actual science."
Also f*ck Graham Hancock (And Joe Rogan via extension). MFer is the worst kind of charlatan and is broadly responsible for how many Americans believe in Atlantis.