We evolved in a tropical climate where the smells of plants and flowers were all around us. We spent a lot of time in the trees with a lot of sunlight and no clothes.

There's a lot of talk about the positive aspects of love. We as a society downplay the danger, the anxiety, and the disappointment. We romanticize romance.

Today, American women bear an average of 2.2 children that live to adulthood. Across most of Europe, women bear even fewer young.

Any time you choose not to hide your tattoo, you're limiting your social sphere, because they're not popular in big business.

If two very different people pool their DNA, they'll create more genetic variety, and their young will come to the job of parenting with a wider array of skills.

A woman of 40 or 50 or 60 can take estrogen replacements, get facelifts, spend her money in bars.

At first I assumed hate was the opposite of love. But it isn't. The opposite of love is indifference.