Final answer:
The Archaic Indians did not travel directly across the Bering Strait, but instead, they migrated from Siberia to Alaska by crossing over the Bering Land Bridge during the last ice age. This migration is supported by the Bering Land Bridge migration model, the oldest and most widely accepted theory of Indian origins.
Step-by-step explanation:
The Archaic Indians did not travel across the Bering Strait directly. The Bering Land Bridge migration model is the oldest and most widely accepted theory that proposes that during the last ice age, humans were able to migrate from Siberia to Alaska by crossing over the land bridge between the continents. This land bridge, known as Beringia, connected northeast Siberia and Alaska when sea levels were lower due to glacial ice formation. From Alaska, the early humans then migrated southward into the Americas, eventually populating both North and South America.