Genomic data provides evidence for a previously unknown wave of migration, with Indigenous groups living in central and southern Mexico spreading into South America and the Caribbean starting around 1,300 years ago

Scientists now think humans settled South America in three waves. Marcos Araújo Castro e Silva

Human settlement of South America may have been more complex and dynamic than previously thought, new research suggests.

Scientists have long suspected that humans settled South America in two waves—one about 15,000 years ago, followed by another roughly 9,000 years ago. Now, with a new paper published April 22 in the journal Nature , researchers report finding evidence of a third, previously unknown wave.…