cavern

The scientists travel 1,500 metres below the surface into three vast underground caverns.

Large underground salt caverns are ideal - but the nearest potential sites are in East Yorkshire and Cheshire.

"Instead of a big, sheer pristine box of ice, you can see caverns under the edges," Prof Meijers says.

If we were to squeeze through small cracks in his mind’s cavern walls or crawl down its miniaturized hallways toward Erickson's nerve center, we might find ourselves in a room with a broken printer.

Galvanized by sound in yawning subterranean caverns, she made her calling “deep listening” as a way to overcome the world’s ever-increasing surface noise.