North America
There are many scientific theories as to the origins of human species in North America. The Native Americans preserved stories their presence that link back to the beginning of creation. The most popular scientific theory is that the first humans who came to the Americas entered by a land bridge that 
connected Siberia to Alaska about 15,000 years ago.The Native Americans who inhabited North America for thousands of years before the Europeans arrived were divided geographically, culturally and linguistically throughout the region. They were separated into small groups of a few families to large city sate empires. Native Americans are responsible for the domestication of the Tomato and of Corn (maize).
Exploration
The first Europeans that landed on North American soil were the Norse Explorers from Iceland lead by Leif Erickson around the year 1000 B.C.E. The settlements that they established in Canada were short lived.
North America is largely believed to have been named after the Italian explorer Amerigo Vespucci, who was among the first to propose that the Americas were not the East Indies but a new undiscovered world. Christopher Columbus was one of the first European explorers who landed in the Americas and he has been given the credit historically as the discoverer of the “New World”, and it Is he who popularized the certainty that the Americas were in a new hemisphere unknown to the Europeans and because of this breakthrough in turn sparked the exploration and settlement of the Europeans in North America.