cavern

It takes about 10 minutes just for the elevator to reach the detector caverns, Sousa said.

The concerto is full of sonic imagery that travels above and below ground, down to the rivers in deep caverns and up in the skies to the environmentally threatened toh bird.

Crews drilled steel pillars deep into the ground, disturbing a fragile ecosystem of thousands of caverns and freshwater sinkholes known as cenotes.

Created in response to the 1970s energy crisis, the reserve can store up to 700 million barrels of oil, most of it in underground salt caverns.

As we make our way into the vast cavern, my guide explains how Eberhard dissected samples and sent them to England for analysis.