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In Photos: Chimp Hurls Stones at Zoo Visitors

  • Sneaky Chimpanzee

    A male chimpanzee named Santino hides rocks and sneaks up on visitors before hurling the projectiles at them.
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    CREDIT: Tomas Persson, PLoS ONE.
  • Stone-Hurling Santino

    To make like he was just wandering about, Santino picks up an apple from a water moat, just 15 seconds before hurling the stones at visitors.
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    CREDIT: Tomas Persson, PLoS ONE.
  • Just Before the Throw

    A male chimpanzee named Santino hurls stones at visitors.
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    CREDIT: Tomas Persson, PLoS ONE.
  • Hay Hiding Spot

    A hay hiding spot for the chimpanzee Santino to hide his stone projectiles.
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    CREDIT: Tomas Persson, PLoS ONE.
  • Alpha Male

    Santino, a dominant male at the Furuvik Zoo in Sweden, with a pile of hay.
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    CREDIT: Screenshot, NDTV
  • Lots of Hiding Spots

    Various hiding spots at the zoo where the chimpanzee Santino hides his stone projectiles.
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    CREDIT: Tomas Persson, PLoS ONE.
The 33-year-old chimpanzee, Santino, has a habit of sneaking up on visitors and hurling stone projectiles at them. Here, he is slowly moving toward visitors, with two projectiles in his left hand. (This image was taken 31 seconds before the throw.)

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