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late 16th–early 17th centuries), and are known only through archaeological investigations and oral history.Other civilizations were contemporary with the colonial period and were described in European historical accounts of the time.A few, such as the Maya civilization, had their own written records.
Exactly when the first group of people migrated into the Americas is the subject of much debate.
One of the earliest identifiable cultures was the Clovis culture, with sites dating from some 13,000 years ago.
However, older sites dating back to 20,000 years ago have been claimed.
Some genetic studies estimate the colonization of the Americas dates from between 40,000 and 13,000 years ago.
Now, the scholarly study of pre-Columbian cultures is most often based on scientific and multidisciplinary methodologies.
Asian nomads are thought to have entered the Americas via the Bering Land Bridge (Beringia), now the Bering Strait and possibly along the coast.
Many pre-Columbian civilizations established hallmarks which included permanent settlements, cities, agriculture, civic and monumental architecture, major earthworks, and complex societal hierarchies.
Some of these civilizations had long faded by the time of the first permanent European colonies and the arrival of enslaved Africans (c.
Within this time frame, roughly pertaining to the Archaic Period, numerous archaeological cultures have been identified.
The unstable climate led to widespread migration, with early Paleo-Indians soon spreading throughout the Americas, diversifying into many hundreds of culturally distinct tribes.
It was not until the nineteenth century that the work of men such as John Lloyd Stephens, Eduard Seler and Alfred P.Tags: Adult Dating, affair dating, sex dating