Lots More InformationRelated HowStuffWorks LinksOther Great Links
- NASA's Intelligent Systems Division
- NASA's Ames Research Center
- JPL Serpentine Robot
- NASA Robotic Missions
- Space.com: NASA's 'Snakebots' Slither to Life
Chances are, if you've done even the slightest bit of traveling, you've crossed your fair share of bridges. These feats of engineering can span anything from a trickling stream to a raging river. Can you cross the bridge quiz without falling?
London without the Tube? New York without its underground scene? Atlantans gliding straight from their MARTA stops to the airport? What would life be like without our underground transportation system?