How a Swedish Chimp Secretly Planned Stone Attacks Before Zoo Opening—And What Happened Next Will Shock You

How a Swedish Chimp Secretly Planned Stone Attacks Before Zoo Opening—And What Happened Next Will Shock You

Ever wonder if animals can outsmart us humans at our own game of planning ahead? Meet Santino, a Swedish zoo chimp who wasn’t just throwing stones on a whim. Picture this: before the zoo even opened its gates, Santino was calmly stockpiling his ammo—3 to 8 stones neatly cached—like some furry little ninja prepping for the chaos to come. Then, when the crowd arrived and riled him up, bam! He’d launch those stones with a purpose, turning his enclosure into a stone-throwing spectacle. This cheeky primate didn’t just act on instinct; he demonstrated something wild—a clear sign of advanced foresight and spontaneous strategizing we usually reserve for humans. And get this—he even fashioned concrete discs as extra firepower. Talk about taking the concept of “stocking up” to a whole new level! Curious to dive deeper into Santino’s stone-cold plan? LEARN MORE.

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A Swedish zoo chimp named Santino calmly stockpiled 3–8 stones per cache before opening time—then, later, while agitated, launched them at visitors, marking one of the first instances of unambiguous evidence that an animal, other than humans, can make spontaneous plans for future events.

sources – 1, 2, 3, 4, 5

In 1997, at Sweden’s Furuvik Zoo, a male chimpanzee named Santino began calmly collecting stones from his enclosure’s moat, forming caches of 3 to 8 stones each before visitors arrived. Over the next decade, zoo staff observed this over 50 times. When agitated by crowds, he’d hurl the stones at them in dominance displays. A 2009 study in Current Biology hailed this as the first clear evidence of a non-human animal planning actions in a calm state for a future agitated one, showing advanced foresight. Santino even crafted concrete discs as extra projectiles, underscoring deliberate preparation.

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