(DIR) xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
 (DIR) Floodgap Gopher Fun and Games
        
       xkcd - A Webcomic - Campfire Habitable Zone (2336)
        
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 (PNG) campfire_habitable_zone.png
        
       Oh no, my marshmallow became tidally locked!
        
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