Linguistic modeling suggests Tupí-Guaraní origins in South American river basins
In short: Researchers using Bayesian phylogenetic methods to analyze language data have proposed a new timeline for the Tupí-Guaraní language family. By examining shared word roots, the study suggests this major language branch emerged approximately 2,500 years ago in the upper Tapajós and Xingu river regions.
This research attempts to resolve long-standing disagreements between archaeological findings and linguistic theories regarding the age and movement of these languages. The researchers used a database of cognate words to build a dated evolutionary tree and a model of geographic expansion.
Because the study relies on linguistic modeling to infer historical timelines, the results provide a statistical estimate rather than direct physical evidence.
Why it matters: Linguistic modeling can help bridge the gap between archaeology and history to trace language expansions.
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