By Lisa M. Truesdale

Thomas Edison invented the light bulb, we switched it on, and our bodies’ internal clocks switched off.

10:50 minutes (2.48 MB)
Tina chats with Dr. Norman Rosenthal, the psychiatrist and scientist who first described seasonal affective disorder (SAD) or winter depression, about how you can prevent, treat and beat the winter blues.

Winter blues are hard to beat. But a few simple steps can make it easier for sufferers of SAD — or Seasonal Affective Disorder.

Hamsters are helping scientists understand why some people are afflicted with Seasonal Affective Disorder (SAD).

Randy Nelson, a professor of psychology and neuroscience at Ohio State University found more SAD symptoms — usually depression and anxiety — in adult hamsters that lived with limited daylight ( just like winter) than in those who were exposed to more light.