The big shift was caused by tetonic plates being moved via the intense heat of earths core having varying effects on the mantel. It's also believed that the "big continent" (Pangaea) has formed several times over. And even today the plates are still moving (1-2 inches per year). What happened to the people? Migration, no one got "stuck" on a floating piece of land or claimed one. Hominins (our first ancestors) migrated northward from a central point in Africa 2 million years ago.
And researches feel that it was due to dramatic climate fluctuations. These fluctuations are believed the happen in mass every 20-30,000 years due the earths cycles. As when the climate drastically changed people needed to expand outward to follow the resources. As far as animals? They do the same thing, climate changes pushed the animals to the area's where they could survive. Or they would evolve to adapt to the new climate / food sources. If climate change happens
too quickly for the animals to adapt they die to the point of extinction. As far as penguins... penguins evolved into well... penguins around 60 million years ago, predating even our ancestors by around 53 million years. When they appeared they were already well south of the equator.
As far as native Americans... the majority of them migrated across the
land bridge between Asia and American during three key migrations. No one called "dibs". Our ancient ancestors were always very nomadic and due to various environmental factors over time, as well as the expanding of populations they spread across the earth.
I am not trying to be abrasive, but you keep saying all sorts of things that have either been explained by science or
being uncovered more and more by the hard work of our scientists. It's a bit frustrating due to the fact that it's REALLY easy to google these things and find legitimate sources. My wife is also a professor of Anthropology, so seeing people say things like "did this or that happen?" along with "think about life, open your mind" in regards to the history of humans irks me. There are hard working people out there who are researching and teaching about the very things that you keep making very weird comments about. And... well your kind of discrediting their work with comments like;
The answers to those three things already exist.
If you want sources to everything I said let me know.