(WTTW News)

It might be the “winter blues” for some. For others, it’s more severe and can be clinically diagnosed: seasonal affective disorder, which is a form of depression that often occurs in the fall and winter when there’s less sunlight.

Scientists at Northwestern University have developed a blood test to detect depression in adults.

In the wake of Robin Williams's death, apparently from suicide, we discuss depression with an expert in mental illness.

A new blood test could diagnose depression in teens. The co-author of a new study tells us how her research could cut down the disease's social stigma.