Bronchitis is an infection that causes a cough. It happens when the tubes that carry air into the lungs, called the “bronchi,” get infected. Bronchitis usually oc­curs when a person gets a cold or the ...

I'm a Fitness & Nutrition writer for CNET who enjoys reviewing the latest fitness gadgets, testing out activewear and sneakers, as well as debunking wellness myths. On my spare time I enjoy ...

The X chromosome carries at least 150 genes linked to intelligence. Since the mother has two X chromosomes to pass along while the father only has one, the mother’s contribution to the child’s ...