Take a look around — you might not be able to see them, but they are everywhere. We are surrounded by forests of bacteria and microbes. And it turns out, that might not be such a bad thing. But our obsession with cleanliness could be.
Though the pesticide DDT was banned in the US in 1972, its effects in the human body may live on. New research has found the strongest link yet between exposure to DDT in the womb and the likelihood of breast cancer later in life.
Talcum powder has been used for more than a century on babies and many people use it for daily hygiene. But a spate of recent lawsuits and some studies suggest using talc could lead to ovarian cancer in adult women. Still, the science is far from settled.