(DIR) xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
 (DIR) Floodgap Gopher Fun and Games
        
       xkcd - A Webcomic - Uncanceled Units (3038)
        
       Image:
 (PNG) uncanceled_units.png
        
       Speed limit c arcminutes^2 per steradian
        
       Comics reproduced from www.xkcd.com under license.
 (HTM) xkcd License (WWW)
 (HTM) xkcd Web Site (WWW)
        
       Previous:
 (DIR) xkcd - A Webcomic - Radon (3037)
       Next:
 (DIR) xkcd - A Webcomic - Human Altitude (3039)