How has life changed over the last century? We visited the homes of the people who lived through it all and asked them what we can learn.
Charles Eugster, 96, is a runner, body-builder, public speaker, writer, rower, and wakeboarder. He also claims to be so healthy that his formerly grey pubes have turned brown again.
Every Saturday, hundreds of elderly danzón fanatics descend on Mexico City's Plaza de la Ciudadela.
Old people are getting it on more than ever before, which means they're getting more diseases than ever before. Do our grandparents need sex ed?