Prehistoric migration from China to Americas confirmed by gene study.

A new genetics study published in Cell Reports finds that some of the first arrivals to the Americas came from China during two distinct migrations: the first during the last ice age, and the second shortly after. The study reveals that a lineage known as D4h, found in mitochondrial DNA, is connected to an ancient lineage responsible for founding populations across the Americas, including Bolivia, Brazil, Chile, Ecuador, Mexico, and California. The scientists think the travelers were seafarers who docked in America and traveled along the Pacific coast by boats.