It's been known for a while that depression is contagious: If your roommate is depressed, you are much more likely to become depressed as well. But it has been a bit of a mystery just how this happens ...

Depression is a common mental illness and a leading cause of disability worldwide. Psychological therapy is often the treatment of choice for depression; however, even evidence-based psychotherapies ...

It can be difficult to tell the difference between feeling down and clinical depression, especially when you're pregnant and your hormones are causing natural mood swings. So what defines depression ...