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Smoking leaves lasting imprint on DNA

Researchers found that for those who stopped smoking, most genes 'recovered' within five years of quitting – but even so, some genetic changes remained, 30 years after quitting.

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Heal your hearing Pain relievers linked to hearing loss in women FDA approves balloon device to clear Eustachian tube

SEE: Interesting facts about hearing loss

Our ears perform quite a complex job – not only are they responsible for helping us hear, they also assist with balance.