Science
How Well Do You Really Know Bridges?
Golden Gate, Tower Bridge, and the engineering that connects the world.
Golden Gate, Tower Bridge, and the engineering that connects the world.
The Golden Gate Bridge used 80,000 miles of wire in its two main cables — enough to circle the Earth three times. This quiz covers 50 questions on the engineering, history, and stories behind the world's greatest bridges, from ancient Roman aqueducts to modern marvels.
You'll discover why the Golden Gate is orange (not gold), the difference between Tower Bridge and London Bridge, how the Tacoma Narrows collapse changed engineering forever, why triangles are the strongest shape in bridge design, and the bridges that played pivotal roles in wars and civil rights.
The Danyang-Kunshan Grand Bridge in China is the longest bridge overall at 164.8 kilometers. For suspension bridges specifically, the Akashi Kaikyo Bridge in Japan holds the record with a main span of 1,991 meters.
The Tacoma Narrows Bridge collapsed in 1940, just four months after opening, due to aeroelastic flutter — wind-induced oscillations that built up until the structure failed. The disaster, caught on film, fundamentally changed how engineers account for wind forces in bridge design.
The Golden Gate Bridge is painted 'International Orange,' chosen because it enhances the bridge's visibility in San Francisco's frequent fog and complements the natural landscape. Despite its name, the bridge was never intended to be gold.
Last updated: March 2026