Introduction The question of how and when human beings reached North and South America is an interesting topic of debate (Muckle 2010). Some general understandings and consensuses are that the native populations inherited their genetic pool from Asian groups that initially occupied Siberia before the last glacial period (Jablonski 2002). However, the actual time and process through which these groups reached America remains unknown (Dixon 2003). A number of theories attempt to address this question, but none of them provides adequate information to show how these groups reached the continents. In the recent times, genetic studies have proved to be effective in determining the relationship between the Native Americans and the Asian groups. In fact, these studies have shown that the American natives are closely related to a number of Asian groups. Several theories such as the Pacific Rim, Biringia, Solutrean and others have attempted to develop models that explain how the Asian groups reached America. The purpose of this paper is to analyze some of these postulates in order to draw some information that may provide a better understanding of the initial people of North America. Theoretical explanation of initial peopling in North America According to scholars in Linguistics, archaeology and evolutional biology, Native Americans moved from some places in Northeastern parts of Asia. During the last Ice Age, geographical conditions could not allow possible migrations of humans from Asia into America (Dickason 2007). Therefore, the most important task is to explain the route and time that allowed migrations from Asia to America. It is suggested that humans used two routes to reach America- the Bering Land Bridge (Beringia) and along the Northwest coast (watercraft methods). Based on this information, a number of hypotheses have emerged to explain how the ancient people migrated into the New World, despite the large volume of ice. Two major hypotheses, the ice-free corridor and the coastal migration, tend to agree that the initial people of Americas had ancestral ties with populations that lived in Siberia and that the major route was via Beringia. Beringia, also known as the Bering Land Bridge, was a large ice-free area that connected north-west part of North America with north-eastern edge of Asia (Dickason 2007). Several Paleoenvironmental research studies have shown that the area on Beringia has a large volume of animals and plants, which acted as resources for the migrating humans. These resources supported the human populations during the entire late ice age, which suggests that the migration was in progress at this time. The ice-free corridor hypothesis The ice-free corridor hypothesis is considered one of the most effective models of addressing the migration question. This theory, which is based on the understanding that at various stages during the last Ice age, the northern part of America (Canada) was covered with two large sheets of ice (Burns 2006). The southern region of the ice sheets was approximately along the line that marks the modern boundary between the US and Canada. One of the sheets was covering most of the areas that lie to west of the Rocky Mountains while the other sheet was on the areas to the east of these mountains. It is believed that the sheets were j