6 hours ago
- Scientists previously believed human evolution had slowed or stopped after civilization, but new research shows rapid genetic changes in the last 10,000 years.
- Using the largest collection of ancient human DNA, researchers identified 479 genes under natural selection, with evolution accelerating in the past 5,000 years.
- A Genetic Relationship Matrix helped filter out noise from migration, revealing clear signals of natural selection in genes related to immunity, baldness, and blood type.
- Examples include a multiple sclerosis risk gene emerging 6,000 years ago and later receding, and a tuberculosis risk gene following a similar pattern.
- The study contradicts some beliefs, such as the cystic fibrosis gene being selected for cholera resistance, finding no evidence of selection during cholera outbreaks.
- Researchers caution that gene functions may have changed over time and that the results do not imply modern humans are healthier or smarter.
- Evolution is ongoing, rapidly responding to cultural, economic, and environmental changes over the last 10,000 years.