U.S. police departments have employed officers who are trained to be experts in detecting "drugged driving." The problem is, ...

Learn what a negative HIV test means, why the window period matters, and when you should consider retesting. Essential health ...

See why the ovary − often reduced to its reproductive role − menopause, age and estrogen affect a woman’s health throughout ...

Researchers are using an advanced brain imaging method called MEG to understand why Parkinson’s drug levodopa doesn’t work ...