There are two principle theories in scientific circles:
North American aboriginal beliefs often feature a creation story indicating a local genesis of the human race without Immigration from Asia.
Africa
Africa
Their migration was facilitated by Saharan grasslands.
The Americas.
About 45,000 years ago.
At the time of the spread of Homo Sapiens, there were no countries. The migration would have been from the Eurasian continent to the American continent via the Aleutian land bridge.
Homo sapiens sapiens, which is the modern subspecies of humans, arrived in the Americas most recently compared to other regions of the world. This migration is estimated to have occurred around 15,000-20,000 years ago.
Homo sapiens(Modern humans are Homo sapiens sapiens, other subspecies include Homo sapiens idaltu.)
Homo sapiens are not extinct. Homo sapiens are humans. Modern humans, in fact.
Homo sapiens Homo sapiens
The only living species of Homo sapiens is Homo sapiens sapiens, which includes all modern humans. Other species within the genus Homo, such as Homo neanderthalensis and Homo habilis, are now extinct.
The first Homo sapiens are believed to have appeared in the Americas around 15,000-20,000 years ago. This migration is thought to have occurred via the Bering land bridge that connected Asia to North America during the last Ice Age.