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Introduction Researches on the beginnings of coastal adaptation and exploitation of marine adaptations have been performed by John Erlandson and colleagues. There are existing anthropological theories that are over 10, 000 BP however, Erlandson believes that the societies of hunter-gather used aquatic resources and one of them were widely used terrestrial hunter-gatherers (Slaymaker, 2007). This was challenging since it's difficult to specify exactly constitutes of marine culture. There's also the shift in surroundings in which there are fall and rise of sea levels and erosion of coastal surroundings. This paper discusses different concepts which have emerged on the origin of early Americans. It seems at the Clovis initial version, coastal migration theory that is located on Kelp Highway Hypothesis. Additionally it explains the Laurentide and Cordilleran ice sheets which may have facilitated the migration of ancient Americans. Ultimately it explains the scientific method and the main reason why this method cannot be implemented in determining the source of the first Americans. The origin of the North and South America has increased concerns for several years. Archaeologists at 1927, who was working close to Folsom, New Mexico discovered a stone spear point embedded within the rib cage with an extinct bison. This gave a sign of the presence of mammals which individuals had arrived in North America from the late Pleistocene. This was approximately 11000 decades back. Years after, a long spear was also found near Clovis in New Mexico which was considered to have existed 11200 decades past (Straus, 1996). Clovis first concept at the moment of this discovery of Clovis and Folsom, Clovis first theory with minimal evidence developed and has been accepted as fact. The theory claimed...