Some scholars report that sewn plank technology may have been introduced by early Polynesian navigators sometime late in the first millennium, who had constructed sewn plank boats and had been known to have reached South America. Scholars state that "three native Californian boat terms are argued to be Polynesian loans: Chumashan "tomol(o)", and Gabrielino "tarainxa" (or "taraina") and "ti?at"." Some modern Chumash and Tongva/Kizh state that “this is something we have always known happened." This was further explained in a short documentary episode by KCET produced in 2019.