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

Billionaires are building ultra-luxury doomsday bunkers that rival five-star resorts with lavish amenities beneath the earth.

CONQUEROR OF THE SEAS FERDINAND MAGELLANThe voyages of Columbus inspired boldness in other great explorers to discover new unhampered trade routes to the Spice Islands of the EastWhen Vasco Da Gama ro ...