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Adherents to this model look at early material and try to trace continuity in morphology from those early populations to later populations in the same geographic area.In this model, there are paralleled changes in all penecontemporary populations, with enough genetic migration to maintain close species bonds, while still allowing the suite of racial features we see today.) did not contribute a significant amount of genetic material to later populations that led to modern humans (some claim no genetic ancestry to these groups and their descendants at all, a “strict” replacement model).

Archaeology is an important field of anthropology, which is the broad study of human culture and biology.

Archaeologists concentrate their studies on past societies and changes in those societies over extremely long periods of time.

Galena would have been noticed by anyone looking for metals in ancient times.

Galena generally contains silver, sometimes in significant quantities.

Whereas in the previous species have been introduced with historical background and a discussion of the early, most important finds, and the individuals responsible for the species designation, this introduction will focus on some of the theory implicit in the discussion of the origin and spread of Most researchers currently accept the statement that “modern” humans can be considered to date to approximately 200–250 kyr.