Gender

In the old days, it was simple: Men hunted and women raised the kids. Then we moved out of caves, invented gender studies, and learned a thing or tow about genetics. Now nothing is clear cut. While social and biological analyses of gender offend some, they have freed others to finally feel comfortable in their own skin.

Aging

By 2030, the number of Americans age 65 and over is projected to be about 71.5 million, of which nearly 10 million will be 85 and up. The good news is that many seniors report better health, greater wealth, and higher levels of education than seniors in past decades. Research on how to stay active and sharp and how to grow wiser is proliferating—it's up to us to act on the information now.