We're apt to fall in love with those who are mysterious and challenging to us.

Experiences shape the brain, but the brain shapes the way we view experiences, too.

Scientists know that women gravitate to men who have a different immune system from theirs.

Men are so visual, they see a woman who appeals to them physically, and it will trigger the romantic love system faster.

It certainly would have been adaptive for ancestral man to have a chubby wife during stressful times of famine. Not only would she have had more calories to burn, and thus more energy and endurance, but since fat stores estrogen, she would have remained fertile for longer.

We spend our lives trying to get along with people so we can keep our jobs, keep our marriages together, so that we can raise our kids properly.

Psychologists maintain that the dizzy feeling of intense romantic love lasts only about 18 months to-at best-three years