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.