After being informed for years that the tongue only detects tastes, there is now evidence that it also has olfactory (smell) detectors (https://www.theguardian.com/science/2019/apr/24/smells-delicious-our-tongues-can-detect-odours-study-suggests). I am not certain, however, whether this new knowledge will really be of much help in combatting the obesity epidemic.
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