A new study of mitochondrial DNA has found evidence for at least two migrations between the Americas, China, and Japan, during the last Ice Age and following melt period. The team traced a rare Native American founder lineage across the continents and time, looking at mitochondrial DNA passed down through females. Using 100,000 modern-day and 15,000 ancient samples, the team was able to identify 216 contemporary and 39 ancient individuals who shared the lineage, mapping its branching paths using carbon dating and comparing mutations picked up along the way. Advertisement Advertisement “The Asian ancestry of Native Americans is more complicated...