Mind-Altering Parasite Blinds Chimps to Imminent Danger

When a chimpanzee sees a leopard, its reaction is appropriately intense and immediate: run away.

Millions of years of evolution have embedded a natural fear of predators in our closest evolutionary ancestors’ minds. However, a parasite found in cat feces, Toxoplasma gondii, may cause them to act irrationally bold when faced with real danger.

Researchers in France and Germany examined the way chimpanzees infected with the T. gondii parasite reacted to leopard urine, and found an intrigu

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