Lorenzo Bruzzone and Leonardo Carrer at the University of Trento in Italy found the cave by using radar to penetrate the opening of a pit on a rocky plain ... creating a tunnel through the rock.

Researchers have found a "unique" collection of "cave pearls"—some of which contain archaeological artifacts—in an ancient tunnel ... such as rocky fragments, mud pieces, blue algae, wood ...

A large gang of men worked all Saturday night and all day yesterday shoring up the sagging elevated structure, which was weakened by the cave-in of the East River tunnel in Battery Park on ...