Women like signs of money and education - things that indicate that not only is this guy going to have some resources, but he's also willing to share them.

Along with our many human propensities, we evolved a huge cerebral cortex with which we make decisions.

As social animals, we need to exchange juicy tales about someone - to connect with one another. For millions of years our forebears must have sat around the campfire, whispering about everyone they knew.

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

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.

Hair that gleams can send a clear sign that you're young and in your prime, whatever your actual age.

From my studies of genetics and neuroscience I have come to believe that people fall into four broad personality types - each influenced by a different brain chemical: I call them the Explorer, Builder, Director, and Negotiator.