Smoking leaves an "archaeological record" of the hundreds of DNA mutations it causes, scientists have discovered: ...a 20-a-day smoker would rack up an average of 150 mutations in every lung cell each year. The changes are permanent, and persist even if someone gives up smoking • /r/worldnews

Smoking leaves an "archaeological record" of the hundreds of DNA mutations it causes, scientists have discovered: ...a 20-a-day smoker would rack up an average of 150 mutations in every lung cell each year. The changes are permanent, and persist even if someone gives up smoking (bbc.com)

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