Science Magazine |
Gene linked to breastfeeding may have boosted survival of earliest Americans
Science Magazine When the ancestors of Native Americans ventured across the Bering land bridge from today's Siberia to Alaska about 20,000 years ago, they struggled to get enough sunlight during the long, dark winters. Living so far north with scant sunshine should ... Breastfeeding changed tooth shape in pre-Native American peoples A genetic mutation led to the growth of mammary ducts and shoveled teeth in Native Americans Did last ice age affect breastfeeding in Native Americans? |
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