Final answer:
Archaeological evidence suggests the existence of a pre-Clovis culture in the Americas, with sites such as Monte Verde in Chile providing artifacts dating back to 16,000 BP. Pre-Clovis peoples had a less advanced tool production and their sites are located below Clovis period occupation.
Step-by-step explanation:
Archaeological sites in the Americas present fascinating evidence of early human migrations. While the prevailing theory was that the first American inhabitants were part of the Clovis culture, recent excavations and research have indicated the existence of a pre-Clovis culture. Some of the well-known pre-Clovis sites include Monte Verde in Chile, where artifacts dating back to 16,000 BP have been found. Initial evidence suggests that pre-Clovis peoples had a less advanced tool production and their sites are located below Clovis period occupation, pushing the dates for earliest occupation further back.