(DIR) xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
 (DIR) Floodgap Gopher Fun and Games
        
       xkcd - A Webcomic - Lunar Cycles (2172)
        
       Image:
 (PNG) lunar_cycles.png
        
       The Antikythera mechanism had a whole set of gears specifically
       to track the cyclic popularity of skinny jeans and low-rise
       waists.
        
       Comics reproduced from www.xkcd.com under license.
 (HTM) xkcd License (WWW)
 (HTM) xkcd Web Site (WWW)
        
       Previous:
 (DIR) xkcd - A Webcomic - Shadow Biosphere (2171)
       Next:
 (DIR) xkcd - A Webcomic - Trained a Neural Net (2173)