On 2 february 1421, China dwarfed every nation on earth. It was during this second migration that the scientists found a surprising genetic link between Native Americans and Japanese people, particularly the indigenous Ainu.The Year China Discovered America Chapter One The Emperor's Grand Plan Increasing human populations during this period might have triggered migrations. The second occurred during the melting period, between 19,000 and 11,500 years ago. The first was between 19,500 and 26,000 years ago during the Last Glacial Maximum, when ice sheet coverage was at its greatest and climate conditions in northern China were probably inhospitable. The results revealed two migration events.
The team from the Kunming Institute of Zoology embarked on a 10-year hunt for D4h, combing through 100,000 modern and 15,000 ancient DNA samples across Eurasia, eventually landing on 216 contemporary and 39 ancient individuals who came from the ancient lineage.īy analyzing the mutations that had accrued over time, looking at the samples’ geographic locations and using carbon dating, they were able to reconstruct the D4h’s origins and expansion history. Known as D4h, this lineage is found in mitochondrial DNA, which is inherited only from mothers and is used to trace maternal ancestry. More recent research, from the late 2000s onwards, has signaled that more diverse sources from Asia could be connected to an ancient lineage responsible for founding populations across the Americas, including in Bolivia, Brazil, Chile, Ecuador, Mexico and California. It was once believed that ancient Siberians who crossed over a land bridge that existed in the Bering Strait linking modern Russia and Alaska were the sole ancestors of Native Americans. Li added that during the second migration, the same lineage of people settled in Japan, which could help explain similarities in prehistoric arrowheads and spears found in the Americas, China and Japan.
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