
Episode 1: The Golden Spoon
Gastropod
00:00
Why Does Copper Taste Bitter?
Researchers blindfolded subjects and gave them spoons with no food on them. They had to place the spoon in their mouth and rate its taste according to words that we gave them. Lots of people agreed zinc was unpleasant and copper was bitter, but gold was a little bit sweet. The group paired these subjective answers up to actual physical properties of the metals. It matched how reactive the metals were with the different tastes people reported.
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