Wanderlust World Wanderlust World The answer is simple: they followed the food. During the last Ice Age, lower sea levels exposed a land bridge between Siberia and Alaska. Large herbivores—mammoths, bison, caribou—migrated across this corridor, and nomadic hunters followed, relying on these herds for meat, hides, bone tools, and sinew.
This wasn’t a single migration but a gradual dispersal over millennia, as humans tracked seasonal movements of game into a new continent. The land bridge was a highway of survival, not a destination.