In Southern California, languages from the Uto-Aztecan family, like Tongva, spoken by the Gabrielino-Tongva people in modern day Los Angeles, and Luiseño, spoken by the Luiseño people in Southern L.A.

Here’s how it works. "The dating and the location of this genetic material coming into California is really important for understanding the Uto-Aztecan migration," study lead author Nathan ...