The Primate "Monolith" Obsession
Researchers recently decided to see what happens when you give chimpanzees shiny minerals like quartz and calcite. The result? Total primate obsession. The chimps didn’t just look at them; they treated them like high-value treasures.
- The Banana Ransom: When the study was over, the researchers realized they had a problem: the chimps wouldn’t give the crystals back. They eventually had to “buy” the largest crystals back using massive amounts of bananas and yogurt.
- The Ones That Got Away: Even with the snacks, some crystals were never seen again. They are presumably hidden deep within the chimps’ hay nests as private stashes.
- Yvan the Collector: A 50-year-old chimp named Yvan became particularly attached to a quartz “monolith.” He was spotted carrying it around with “great panache,” eating his cabbage with one hand while clutching his crystal in the other, and even sleeping with it.
📐 Why do they care?
The lead researcher, Juan Manuel García-Ruiz, thinks this isn’t just “monkey see, monkey do.” He believes crystals are the only Euclidean objects (perfect geometric shapes) found in nature.
- The Spark of Geometry: Because crystals have straight lines and perfect angles, they might have been the “software update” for the primate brain.
- Deep History: Humans have been collecting these stones for at least 700,000 years. This study suggests our love for diamonds and shiny jewelry isn’t a “culture” thing—it’s a “primate brain” thing.
📊 Shiny vs. Boring: The Chimp Verdict
| Object | Chimp Reaction |
|---|---|
| Quartz Crystal | Immediate theft, hoarding, and sleeping with it |
| Plain Sandstone | Complete and utter indifference |
| Trade Value | High (Requires premium yogurt) |
🔗 Origin
- Source: By Cara Giaimo via The New York Times (March 2026).
- Scientific Paper: Frontiers in Psychology (2026).
See also: Evolutionary Psychology, Primate Behavior