Some of the first arrivals came from China during two distinct migrations: the last ice age, and the second shortly after. Read more at straitstimes.com.
WASHINGTON - As the last continents to be settled by humans, the question of how and when people first came to the Americas has long intrigued scientists.
Mr 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. Known as D4h, this lineage is found in mitochondrial DNA, which is inherited only from mothers and is used to trace maternal ancestry.
The results revealed two migration events. 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 likely inhospitable.
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