University of Calgary researchers are attempting to prove toenails can provide crucial data about radon exposure, a leading ...

That’s why radon is the main cause of lung cancer in people who’ve never smoked, killing more than 3,000 Canadians each year.

When Maria Delgado noticed a dark streak under her big toenail, she assumed it was from dropping her gym bag on her foot. Six months later, that seemingly innocent mark led to a diagnosis that saved ...