For centuries, humans have lived underground. Today, that ancient practice is under dire threat—even as cave life makes more ...

In Kenya’s capital city, Nairobi, it is estimated that over 70 per cent of the population live in informal settlements.

The Himalayan village of Samjung did not die in a day. Perched in a wind-carved valley in Nepal's Upper Mustang, more than 13,000 feet (3,962 meters) above sea level, the Buddhist village lived by ...