This is a serious mind bender, dig a little and you will see. Mostly destroyed in the early 19th century but remnants hung on into the early 20th century in the Siberian region until the Soviets destroyed the last cities. These people and their culture were erased from history for some reason.

Then you look at the mud floods of 1812 and how it changed North America. Don't you think its strange that European Americans didn't settle beyond the Mississippi until after the 1811/1812 events?

Do you know what happened in 1811/1812? Thousands of earthquakes, the "black Comet" A summer without a sun. The Mississippi flowed backwards, the landscape of America seems to have changed at that point, possibly a lost civilization of North and South America erased from history. Columbia and Venezuela totally destroyed by mud flows, giant lakes spilled out and erased the past in both North and South America.