SciencePrehistoric (c. 9,000 BCE–present study)Americas (Belize, Brazil, Central Andes, Southern Cone)high confidence

Researchers analyzed DNA from 49 people who lived over a span of 10,000 years in Belize, Brazil, the Central Andes, and southern South America.

Notes on verification

Directly confirmed by the original peer-reviewed Cell study and corroborated by multiple independent press releases (HHMI, EurekAlert, ScienceDaily, UCSC, UNM) that consistently cite the 49-individual, ~9,000-11,000 year timeframe across the four regions. [cascade flags: aggregator_dropped_primary_exists | tier=silver indep_score=0.925 clusters=2 claim_tier=notable]

Sources