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A bridge is a structure built over an obstacle to provide passage for cars, people, trains, animals and bicycles. Engineers generally design bridges in one of six types (beam, cantilever, arch, suspension, cable-stayed or truss) although bridges can be a combination of several types. Learn more at this week's roundup of engineering sites.

The recent trend toward cloud music has several benefits. Putting your music in "the cloud" can ease syncing music across many devices, provide backup in case of computer disaster, offer social tools to share your musical tastes, introduce you to new music, and allow you to stream music on devices that do not have enough memory space to hold a large music collection. Most cloud services do not off...

Although American physicist Richard Feynman won the Nobel prize in 1965, it was his books of anecdotes ("Surely You're Joking, Mr. Feynman!" and "What Do You Care What Other People Think?") and his appointment to the presidential Challenger disaster investigation commission in 1986, that raised him to icon status. Feynman was an independent thinker, extremely intolerant of stupidity. Learn why Fey...