history
Chapter 1 New World Beginnings Peopling the Americas Ice Age contributed to North Americas human History Sea levels dropped a land bridge connecting Eurasia and North America was exposed in the Area of the Bearing Sea between Siberia and Alaska Small bands of nomadic Asian hunters crossed the bridge following migratory herds of game As the ice age ended the land bridge was covered by the sea closing the passage for new immigration 54 million people inhabited the Americas by 1492 Aztec and Inca people built elaborate cities and were sophisticated civilizations The Earliest Americans Corn transformed the nomadic ways of the people Cultivation of corn lead to the formation of settled agricultural villages Three sister farming Beans, squash, and corn