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       xkcd - A Webcomic - Feathers (1104)
        
       Image:
 (PNG) feathers.png
        
       Click to see a video of a modern bird using stability flapping
       during predatory behavior. It all fits! Also, apparently
       Microraptor had *four* wings? The past keeps getting cooler! (And
       there's more of it every day!)
        
       Comics reproduced from www.xkcd.com under license.
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