(DIR) xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
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       xkcd - A Webcomic - Exoplanet Observation (2828)
        
       Image:
 (PNG) exoplanet_observation.png
        
       NASA prefers to say that their rovers are 'looking for signs of
       past life on Mars' and not 'ghost hunting.'
        
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