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LESSON 4 · How Humans Evolved

Evolution Has Not Stopped

Humans are still evolving because survival and reproduction are still uneven. Recent examples include lactase persistence in dairying populations, malaria-related blood variants, and high-altitude adaptations in Tibetans and Andean populations.

Culture changes the pressures, but it does not remove them. Medicine, cities, diets, pathogens, and climate all keep reshaping which traits matter.