A parasite that makes mice unafraid of cats may quash other fears too

Toxoplasma gondii can mess with all sorts of mice behaviors, a new study shows

Cat on grass

The parasite Toxoplasma gondii turns mice’s fear of cats into curiosity. The parasite emboldens mice in other situations too, a new study finds.

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A parasite common in cats can eliminate infected mice’s fear of felines — a brain hijack that leads to a potentially fatal attraction.