Image compliments of Siberian Times
Latest DNA evidence indicates that North American Natives came from Asia. During the peak of the last Ice age, about 21,000 years ago, the Laurentide Ice sheet was at its maximum extent, covering all of Canada and merging with the Cordilleran Ice sheet.
At this time world wide water levels were about 300 feet lower, exposing a land bridge in western Alaska between North America and Asia. The land bridge was also covered in ice at this time but about 15,000 years ago the ice began to recede exposing the ground.
It is thought that humans from Asia made their way into North America from Asia along this land bridge. They were following the mammoth herds which they hunted for food.
Image compliments of University of Texas
Human female skeleton found in a cave in Mexico was determined to be about 15,000 years old. They were also able to extract DNA evidence from this skeleton and they found similar gene sequence to todays North American Natives. This was described in National Geographic magazine Jan. 2015.
This was added to DNA evidence found from the skeleton of a young male known as "clovis boy".This astounding evidence was described in National Geographic magazine Feb. 2014. DNA evidence from both these skeletons corroborate the hypothesis that North American Natives were derived from Asia.
Although there are still some major differences between Asians and North American Natives it is thought that as the ice receded about 12,000 years ago, world sea levels rose, submerging the land bridge and cutting off Asia from North America.
It is thought that the DNA differences developed during this time where North America was isolated from Asia.
Maddalena Environmental Inc.