A squeeze down a narrow crack, and then an amazing discovery
![A squeeze down a narrow crack, and then an amazing discovery](http://images.worldnow.com/AP/images/8767838_G.jpg)
Jagged rocks hooked into Steven Tucker's overalls as he squeezed through a crack deep in a subterranean cave. Upon emerging at the other end, he saw he was in a chamber with stalactites hanging from the ceiling. Then...