Earlier quoted context omitted.
What does that mean?
https://en.wikipedia.org/wiki/Population_bottleneck ?
"A 2005 study from Rutgers University theorized that the pre-1492 native populations of the Americas are the descendants of only 70 individuals who crossed the land bridge between Asia and North America."
https://www.livescience.com/289-north-america-settled-70-peo...