The researchers also uncovered other tunnels — almost all made of brick with a barrel vault, or curved ceiling — including one that heads in the direction of the Basilica of Santa Maria delle ...

But below the city's streets is something few people know about - an underground network of tunnels holding the remains of millions. The Paris Catacombs stretch beneath the city and contain the ...

Calcium carbonate dust found in the tunnels is also a common excretion from microbes that live in these types of rocks. However, no fossilized organisms have yet been found—just evidence of ...

The House of Representatives passed a bill aimed at cracking down on Mexican cartels' use of tunnels underneath the southwestern border to smuggle illegal immigrants and illicit items the U.S. The ...