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flag New study claims teeth first evolved as skin sensors in ancient fish, not for chewing.

flag A new study suggests that teeth initially evolved as sensory organs on the skin of early fish rather than for chewing. flag These tooth-like structures were likely sensitive nodules that detected environmental changes. flag The research examines fossils and finds that these early structures are more similar to sensory organs in arthropods than to true teeth, which are unique to vertebrates. flag This discovery supports the theory that teeth first appeared outside the mouth before moving inside.

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