Women who get up early, less driven to depression

This research of more than 32,000 women published in the Psychiatric Research journal found that women who are most likely to wake up early are further off the risk of developing mental illness because of the greatest exposure to daylight.

Researchers at the University of Colorado also examined the links between mood disorder and chronotype (e.g. How early or how late a person is synchronized with 24 hours).

This study found that people who wake up late are more likely to be depressed but also consider other factors such as living alone, being single, and smoking.