Are you a social butterfly, or do you prefer being at the edge of a group of friends? Either way, your genes and evolution may play a major role, U.S. researchers reported on Monday.

The "love" hormone linked to feelings of sexual pleasure, bonding and maternal care also appears to help us recognize familiar faces, Swiss researchers said on Tuesday.

Take heart, scientists have discovered that people can have a love that lasts a lifetime.

The facial expressions we make to show or hide our emotions are hardwired into our brains rather than learned during life, a study has concluded.

Not just any old laughter, but laughter yoga, a form of exercise that blends bold belly laughs and noisy "meditation" with rhythmic clapping, waddling around like a penguin or taking part in a conga line, and deep, yogic breathing.

No one likes being jolted awake from a deep sleep, especially when what riled you up was an assailant, a snake in the bed, or being engulfed by flames. Bad dreams — or worse, nightmares — aren’t just annoying; when reoccurring, they can disrupt a good night’s sleep, and sometimes, life.

In the last few years, psychologists and researchers have been digging up hard data on a question previously left to philosophers: What makes us happy? The emerging field of positive psychology is bursting with new findings that suggest your actions can have a significant effect on your happiness and satisfaction with life. Here are 10 scientifically proven strategies for getting happy.

When you walk into the mall to do your holiday shopping this season, what will influence your spending decisions? Are you in control of what you buy? Not as much as you might think, says brand and marketing expert Martin Lindstrom.

Older people tend to feel about 13 years younger than their chronological age, a new study finds.

How happy you are may depend on how happy your friends’ friends’ friends are, even if you don’t know them at all.