Is it possible to define, measure, and even increase how wise a person is? Psychiatrist Dilip Jeste is trying to answer those questions.

Copenhagener Ole Kassow launched a program to help elderly Danes get back on bicycles. Now volunteer pilots in 29 countries are taking their passengers on the road.

People are living longer thanks to improvements in healthcare, nutrition and technology. This population shift brings with it incredible possibilities — but also a new set of challenges. So … How do we care for our elderly?