Ask Smithsonian: What’s the Deepest We’ve Ever Dug Into the Earth?

Whats the world record for deepest vertical dig? Go ahead, take a guess. We bet you wont come close to the surprising answer unearthed in this one-minute video by Ask Smithsonian host, Eric Schulze. Then, stick around to find out what scientists found lurking below. (1:17)

Learn more about digging deep here.

Have a question in mind? It's your turn to Ask Smithsonian.