Your DNA is constantly mutating, and that’s a good thing

This episode of Science Friday explores the revolutionary understanding that human DNA is not static but constantly mutating throughout life, challenging the long-held belief that our genetic code remains unchanged from birth. Host Ira Flato speaks with science writer Roxanne Kamsey, author of 'Beyond Inheritance,' who explains how spontaneous mutations—driven by cell division, DNA repair errors, and environmental factors—create a genetic mosaic across the body. These mutations are not just linked to disease but are essential for immune function, enabling our bodies to adapt to pathogens. Surprisingly, mutations can also correct inherited disorders, as seen in rare cases where patients spontaneously overcome conditions like immunodeficiency and Fanconi anemia. The discussion delves into how mutations contribute to heart disease, stroke, cancer, and aging, while also highlighting cutting-edge tools like single-cell sequencing that allow scientists to study these changes at unprecedented resolution. Kamsey emphasizes that everyone is a 'mutant'—there is no genetic 'us' versus 'them'—and that this new perspective could transform medicine by enabling therapies that harness natural mutation processes for healing.