Name two ways the first Americans may have migrated to from Asia?

Two possible routes that the first Americans may have migrated to from Asia are:

1) The Bering Land Bridge: During the last ice age, sea levels were much lower, exposing a land bridge between Siberia and Alaska. People from Asia could have crossed this bridge on foot and then spread throughout the Americas.

2) The Pacific Coast Route: Some scientists believe that people may have also migrated to the Americas by boat, traveling along the Pacific coast from Asia to North America.