Dinosaurs lost the ability to taste sugar; hummingbirds re-evolved it
Chickens are not fussy eaters. Any object resembling food is worth an exploratory peck. But give a chicken the choice between sugary sweets and seeds, and they will pick the grains every time. This is odd. Many animals, including our own sugar-mad species, salivate for sugar because it is the flavor of foods rich in energy. New research suggests that many birds’ lack of interest in sugar is the result of genes inherited from their dinosaur ancestors.
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