Supposedly there is this documentary on Netflix that shows some good evidence that an advanced Atlantis type civilization was destroyed in about 13,000 BC by a comet or something like that. This would push back human civilization from the hunter/gatherer stage back quite a bit, since most anthropologists say civilization as we know it started about 4,000 BC (even though sites in Turkey already show that is wrong).
This documentary has all the experts class people riled up about his apparently popular Netflix show. On Twitter, I see Bible believers of one stripe or another saying it's evidence for a flood type event from Genesis, which exists is most cultures' mythology. This may or may not be the case. Atlantis is a popular idea too, and the Atlanteans may have spread civilization out to the hunter/gatherers after the loss of their homeland in the flood.
I intend to watch it this weekend. Here's an article on it.
I leave room for that, but more and more evidence stacks up to them being two distinct events, coming at either end of the Younger Dryas and about 1200-1400 years apart. The case for the Great Flood at about 13,000 years ago is particularly strong, coming from several quite independent lines of evidence.
Atlantis is much more fuzzy all around and I haven't studied it closely, but for a number of reasons my working thesis is that it was located in Antarctica. The best evidence for that has been assembled by Rand and Rose Flem-Ath. It seems Antarctica was displaced from significantly farther north, but if it was spontaneous or part of a larger crustal shift as discussed by Chan Thomas is still not firmly established (at least to my knowledge).
There are two interesting points for the conspiracy-minded as regards Antarctica. One is that after I first heard the strong case for it years ago, I find it's virtually never mentioned by Atlantis researchers. That fits the thesis that the vast majority of them are ultimately disinfo agents. The other is that we would finally get a clue towards explaining what all those Elites went down there to look at. I never bought that it was penguins.
Finally, through two very different associations, I connect both the Great Flood and Atlantis directly to the Anunnaki, a faction of whom the Elites still serve to this day. Taking that into account, I understood why the Elite believe it's so important to steer people over a cliff on both those issues.