Humans Are Still Evolving Right Before Our Eyes. Here Are 5 Signs on Our Bodies
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Humans Are Still Evolving Right Before Our Eyes. Here Are 5 Signs on Our Bodies

Yahoo • • health

Key Points:

  • Human evolution continues today, with physiological changes evident in traits such as lactose tolerance, starch digestion, blood oxygen delivery, and skin pigmentation.
  • Lactose tolerance spread through natural selection in populations that domesticated dairy animals about 10,000 years ago, allowing 30-35% of adults globally to digest lactose without discomfort.
  • Indigenous Andean populations evolved enhanced starch digestion capabilities linked to potato domestication, with gene variants providing a small but cumulative reproductive advantage over millennia.
  • Tibetan high-altitude communities show adaptations improving blood oxygen saturation, directly correlating with higher live birth rates and demonstrating ongoing natural selection.
  • Genetic studies reveal recent evolution in skin pigmentation among West Eurasians favoring lighter skin for vitamin D synthesis, while the rise in myopia may be driven by genes with mixed beneficial and detrimental effects through antagonistic pleiotropy.

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