Did you know that during the peak of the last Ice Age about 20,000 years ago, a trip from Asia into the Americas would not have been very desirable. North America was covered in icy permafrost and tall glaciers. But, coincidentally, the presence of so much ice meant that the trip was, in a way, easier than it would be today. That amount of ice meant that the sea levels were much lower than they are now. It also meant that a stretch of land emerged between Siberia and Alaska. People and animals could just simply walk across from Asia to North America.