(DIR) xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
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       xkcd - A Webcomic - Foucault Pendulum (2201)
        
       Image:
 (PNG) foucault_pendulum.png
        
       Trust me, you don't want to get on the wrong side of the
       paramilitary enforcement arm of the International Earth Rotation
       and Reference Systems Service.
        
       Comics reproduced from www.xkcd.com under license.
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