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Chimps love crystals and won’t give them back

Ellsworth Toohey
Mar 04, 2026
∙ Paid

Chimpanzee (Alexwilko/shutterstock.com )

Good luck getting a quartz crystal back from a chimpanzee. Researchers at Spain’s Rainfer Fundación Chimpatia near Madrid handed crystals to two groups of rescued chimps and quickly discovered the hard part wasn’t the science — it was the negotiations. Caretakers had to trade bananas and yogurt to retrieve the lar…

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