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The Land Bridge theory, also known as the Bering Land Bridge theory, proposes that early humans migrated from Asia to the Americas by walking across a now-submerged landmass, Beringia, which connected Siberia and Alaska during the last Ice Age due to lower sea levels. -
Revisiting the Out of Africa Theory: New Narrative From ...The Out of Africa theory, or the Recent African Origin model, proposes that modern humans (Homo sapiens) originated in Africa and then dispersed to other parts of the world, replacing archaic hominins. This theory is supported by evidence from fossils, genetic diversity, and linguistics, which show greater diversity within Africa and indicate that modern humans evolved in Africa before migrating outward. -
The Solutrean hypothesis is a theory suggesting that the Clovis culture in North America originated from Upper Paleolithic Europeans (Solutrean culture) who migrated across the Atlantic Ocean via an ice bridge during the Last Glacial Maximum -
The Coastal Migration Theory argues that ancient peoples may have traveled by boat along the Pacific coast, taking advantage of rich marine resources for food. Archaeological evidence suggests that early humans were capable of constructing watercraft and navigating coastal waters, supporting this theory.