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Some experts thought this could mean the newts were making the toxin themselves, but TTX is a complex compound to manufacture in the body, study author Patric Vaelli, a molecular biologist at Harvard University, tells Science News

Furthermore, outdoor air (which always has some particles) constantly infiltrates your home through windows, doors, and ventilation

While youre smoking: Nicotine disrupts sleep and smoking can also raise the risk of developing sleep conditions, such as sleep apnea

Older generations did not usually start to smoke until well into adult life, and usually smoked only a few cigarettes per day