In 1963, while renovating a modest home in Derinkuyu, Turkey, a homeowner stumbled upon a remarkable entrance to a sprawling ...

By studying life deep inside a former gold mine, a Northwestern University-led team of scientists has uncovered evidence that ...

Denver International Airport is set to open its infamous underground baggage tunnels to the public as part of a massive ...

For decades, engineers have searched for underground tunnels by sending signals from the surface downward—an approach that can miss what lies below. By reversing that approach, researchers at the ...

Cornell University researchers have discovered one of the largest known underground bee colonies in the world, with an estimated 5.5 million bees.