When I was a kid, I discovered a Calvin and Hobbes comic strip that posed one of my own burning questions: How do they know the load limit on bridges? Calvin’s dad (incorrectly) tells him, “They drive ...

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

Originally built to endure hurricanes, the Gulf Coast's first underwater tunnel took on a new purpose during World War II: ...