Still, in the past two or three years he has treated a growing number of older people for heart attacks suffered while dancing.

WSJ: Not Content to Sit on Porch, Florida Retirees Rock On

This age group is growing the fastest because older people tend to be latecomers to Facebook.

NPR: As Facebook Matures, Is It Losing Its Edge?

The number of older people worldwide is growing faster than any other age group.

BBC: UN warns over impact of rapidly ageing populations

While more people aging with HIV are living healthier, more productive lives than ever before, growing older with HIV may present multiple medical challenges.

WHITEHOUSE: National HIV/AIDS and Aging Awareness Day: Recognizing the Challenges of Growing Older with HIV/AIDS | The White House