Maybe we got the story of Atlantis backward. Remember that Bolivia is at a high altitude compared to sea level.
Perhaps Atlantis (Bolivia) didn't sink--but the country around it did!
Or maybe Atlantis/Bolivia rose instead of sinking.
Or maybe...
What doesn't happen all the time are the pictographs drawn in caves and on the undersides of cliffs in Samiland in Finland. These items date back to 7500 BC. Among other things, you can clearly understand some of the stories they tell and notice that much of the material shows up in the earliest Sumerian stories millenia later.
Even the aboriginal languages there are cognates of ancient Sumerian.
The pictographs are still older than anything these guys have found in the Americas, or even the Middle-East, China, Egypt, North Africa, or just about anywhere else than the extreme North Coast of Europe~!