Scientists think baby animals evolved to cry to alert their parents when in distress. Humans also shed a third type, ...

Why do we cry? There's actually some good reasons for it — and an explanation for why shedding some tears can make us feel ...

For individuals with Seasonal Affective Disorder (SAD), a type of depression linked to reduced seasonal light, these effects ...

As winter approaches and daylight hours grow shorter, people prone to seasonal depression can feel it in their bodies and ...

So while you may not feel the need for a SAD light to lift your mood, using one for a bit of circadian manipulation could be ...