Andean Highlanders Evolved Genetic Advantage for Life at Extreme Altitude

People living high in the Andes mountains have developed a remarkable genetic adaptation that helps them thrive where oxygen is scarce. Researchers studying indigenous Andean populations found that natural selection has favored certain gene variants over thousands of years, allowing these communities to live and work at elevations above 4,000 meters. The key discovery involves changes in genes related to how the body processes oxygen and manages blood flow, giving highlanders a distinct physiological edge over lowlanders who visit the region. This adaptation reduces the risk of chronic mountain sickness and improves overall endurance in thin air. The findings, reported by ScienceAlert, highlight how human evolution continues to shape populations in response to extreme environments. Understanding these genetic mechanisms could one day lead to better treatments for altitude-related illnesses and even conditions like hypoxia in patients with heart or lung disease. As scientists map more of these high-altitude genes, the Andes remain a living laboratory for human resilience and adaptation.