Actually, that's not that long ago, all things considered.
If not mistaken, Al Sharpton's great-great grandpappy discovered America around that time...right after he built the Pyramids in Egypt.
“It is unknown what the figures represented to the Native Americans who made them in the Middle Woodland period of some 2,000 years ago.”
Actually, that’s not that long ago, all things considered.
—
No it’s not. Considering this:
“They are not recognisable characters from ethnographically recorded Southeast Native American stories, nor from archaeologically known iconographic...”
It seems a genocide took place and the group that drew these was wiped out.