Humans have an extraordinarily high genetic mutation rate — which just means we’ll never be perfect. Laurence D. Hurst is professor of evolutionary genetics in the Milner Centre for Evolution at the University of Bath, and he joins host Krys Boyd to discuss why imperfection is baked into our genetic code, why other species can get rid of “junk” DNA better, and what this means for human evolution. His book is “The Evolution of Imperfection: The Science of Why We Aren’t and Can’t Be Perfect.