arnaia:Carl Sagan on humans (from The Sagan Series) [x]
![arnaia:Carl Sagan on humans (from The Sagan Series) [x]](https://64.media.tumblr.com/b8fcbeac98c3641de7afb5e3dbc5a3ff/tumblr_mlm4e543kg1qheym2o1_r1_500.gif "arnaia:Carl Sagan on humans (from The Sagan Series) [x]")
![arnaia:Carl Sagan on humans (from The Sagan Series) [x]](https://64.media.tumblr.com/aa9f9bc1e563d97174554922123726a9/tumblr_mlm4e543kg1qheym2o2_r2_500.gif "arnaia:Carl Sagan on humans (from The Sagan Series) [x]")
arnaia:Carl Sagan on humans (from The Sagan Series) [x] -- source link
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arnaia:Carl Sagan on humans (from The Sagan Series) [x] -- source link
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