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    Twilight Sparkle & Caesium-137 Half-Life
    Twilight Sparkle & Caesium-137 Half-Life

    Twilight Sparkle from My Little Pony: Equestria Girls reacts to a question about Caesium-137's half-life.

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    #Twilight Sparkle#half-life#caesium-137#science#meme#animated#My Little Pony

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