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 ...

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.

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 ...