Massive ice-wall may have blocked passage for first Americans

The first people who migrated to the Americas from Asia may have had to take a circuitous coastal route, as direct passage overland may have been blocked by a massive wall of ice.

Massive ice-wall may have blocked passage for first Americans
The first people who migrated to the Americas from Asia may have had to take a circuitous coastal route, as direct passage overland may have been blocked by a massive wall of ice.