The type of people most likely to be psychopaths, narcissists and manipulators. People who have a tendency to stay up late are more likely to exhibit anti-social personality traits, like narcissism and psychopathy. Machiavellianism, narcissism and psychopathy — menacingly called…

Watch the eyes for this sign that a partner is 50% more likely to cheat on you. Partners who spend a fraction of a second longer looking at other people they find attractive are 50% more likely to cheat, psychological…

During slow-wave or deep sleep, the brain is cleared of waste products. A single night of disrupted sleep is enough to increase a brain protein linked to Alzheimer’s, new research shows. A full week of poor sleep causes increases in…

Lonely people quickly move to the edges of social networks — here’s why. Loneliness makes the areas of the brain that are vigilant for threat more active, a new study finds. This can make people who are socially isolated more…