What's a Mystery Clock?

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10 Great iPhone Camera Apps Computer Tracking Sport Tech Mystery Clock 10 Great iPhone Camera Apps Smartphone cameras are so simple they've made photography, well, a snap. See what apps can turn your iPhone pics into works of art. Editing Digital Photos 10 Mobile Apps for Bookworms 5 Questionable iPhone Applications Is your workplace tracking your computer activities? If you're surfing the Internet at work, you may not be the only one who knows. Watching workers has become an industry unto itself. Find out exactly how companies are monitoring employees. Computer Pictures 10 Tips for Handling Coworkers on Facebook Hiding Your Computer Screen at Work Sport Tech Do you know how Olympic races are timed or how exercise gadgets can track your vitals? See what technology is behind the scenes and in the latest sport and fitness gadgets. Helmets That Detect Concussions How FitBit Works How the Nike+ SportBand Works What's a mystery clock? Mystery clocks represent that enigmatic intersection between horology and magic. What makes their floating hands move and keep time so well? Amazing Timepieces How Digital Clocks Work 10 Strange Facts About Atomic Clocks   At Discovery, we value your privacy. If you would like to adjust your email preferences, please click this link to our subscription center, where you can manage your account. Please click here to unsubscribe. Discovery Communications, LLC One Discovery Place, Silver Spring, MD 20910