Nature World News: Third-hand cigarette smoke-residue that clings to surfaces even after the smoke has cleared out can damage DNA, according to a new study. The study was conducted by researchers from Lawrence Berkeley National Laboratory and colleagues who found that chronic exposure to this toxic residue could severely affect cells. Smoking causes many types of cancers including lung, bladder, kidneys, mouth and ovaries. Previous researches have revealed that second-hand smoke could just be as dangerous to human...