The only way they COULD migrate, was by boat ( in later years) and in the beginning ( sround 10,000 B.C) they crossed the Bering Strait, from Siberia and continued south to South America.
EVERYWHERE!
Because they want freedom.
Land bridges
U use animal
Yes, they came from Europe, China and the Americas.
Because they think Americas will stop them.
The Bering Strait .
Yes they did, in order to go to the Americas they crossed over a land bridge between Russia and Alaska(present day).
Asia.. If your doing PLATO. It's Asia.
Most likely it would've either been in search of food or a home.
Over temporary land bridges cause by the Ice ages
They migrated through the Bering Strait when it froze