The Israel Defense Forces (IDF) on Sunday said it has uncovered "the biggest Hamas tunnel" in Gaza, spanning a length of four kilometers (2.5 miles). The IDF said the tunnel, secured "a few weeks ago" ...

Astronomers have made a startling discovery. Using data from the eRosita X-ray instrument, researchers say they've discovered a "cosmic tunnel" that connects our solar system to other stars.

Over 200 underwater bridge tunnels exist for vehicular traffic around the world, providing connectivity between cities. Once ...

After centuries of speculation, archaeologists in Peru have confirmed the existence of an underground tunnel network, thought to have been built by the Incas. The groundbreaking discovery was found ...

Pittsburgh’s Liberty Tunnels Ventilation System is now an American Society of Civil Engineers (ASCE) National Historic Civil ...