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Hmmm.....back in the 80s Australia required a national advertising campaign (from a butter company) to inform us that our taste buds were on the top of our tongue. At the time I felt sorry for people in less developed countries who apparently thought that their tastebuds were on their feet. Now I'm not feeling so smug.
You probably remember the diagram from school – a pink tongue with different regions marked for different tastes – bitter across the back, sweet across the front, salty at sides near the front and sour at the sides towards the back. I can remember a biology class where we made sugar and salt solutions and pipetted them onto different parts of our tongues to confirm the map was right.
At the time it all seemed to make sense, but it turns out it’s not quite this simple.
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