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XKCD ‘Solar System Changes’

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XKCD, ‘Ground Vs. Air’

| | Sarcasm, satire, Science Humor, XKCD
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XKCD ‘Transit of Mercury’

| | Sarcasm, satire, Science Humor, XKCD
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via    the comic delivery system monikered  Randall Munroe  at   XKCD  !

XKCD, Recombination And Reionization

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XKCD, Earth-Like Exoplanet

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XKCD, Geologic Time

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XKCD, Lunar Cycles

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XKCD, ‘An Apple A Day’

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