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The secret behind chili peppers’ spiciness is a chemical called capsaicin, which targets pain receptors in mammals—but birds don’t have these same receptors, making them immune to the burning sensation. This evolutionary trick discourages mammals (who might chew and destroy seeds) while encouraging birds, who swallow seeds whole and disperse them intact over long distances.
This bird-plant partnership benefits both species: the chili plant ensures its survival, and the birds get a nutritious snack without the fiery consequences. Nature’s marketing strategy? Hot for mammals, mild for birds.
,PlantEvolution ,Capsaicin ,BirdsAndPlants ,SeedDispersal ,SpicyFacts
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