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Biologist Rachel Carson could also write; witness The Sea Around Us, her 1951 best-seller. Ten years later, at 54, she finished another book. It eloquently examined how pesticides like DDT, in use only since the 1940s, were contaminating the food chain. Silent Spring led to a US ban on most uses of DDT in 1972, eight years after Carson's death. It also sparked a global rethinking of man's place in the ecological scheme.