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.
Over temporary land bridges cause by the Ice ages
Most likely it would've either been in search of food or a home.
They migrated through the Bering Strait when it froze