(DIR) xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
 (DIR) Floodgap Gopher Fun and Games
        
       xkcd - A Webcomic - RNA (3056)
        
       Image:
 (PNG) rna.png
        
       2040s: RNA formed the basis for life each of the five known times
       it arose on the early Earth.
        
       Comics reproduced from www.xkcd.com under license.
 (HTM) xkcd License (WWW)
 (HTM) xkcd Web Site (WWW)
        
       Previous:
 (DIR) xkcd - A Webcomic - Giants (3055)
       Next:
 (DIR) xkcd - A Webcomic - Excusing Yourself (3057)