article_snippet: a new study was based on Tsimane people, who are an indigenous population of forager-farmers and hunters who live in the lowlands of Bolivia's Amazon basin.
article_snippet: a new study was based on Tsimane people, who are an indigenous population of forager-farmers and hunters who live in the lowlands of Bolivia's Amazon basin.
highlights_snippet: Researchers  tracked hormone levels of Tsimane people in Bolivia .
  