I love you sarcastic anon
I hope that the true history of the world (with Atlantis, Lemuria,etc) will be revealed along with all the other disclosures
around 12,000 years ago, there was a shift on the planet (just like now). That changed caused a great flood. That's when the last remnants of Atlantis were destroyed.
The biblical floods are just another version of the same story. The bible isn't even the only document that talks about a "great flood".