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For hundreds of years, scientists have recognized four basic tastes: sour, sweet, salty and bitter.

More recently, a Japanese chemist discovered a fifth basic taste, umami, which perhaps best described as savory, is especially prevalent in truffles, meat and anchovies.

And now, scientists from the US announced that they have found a sixth basic taste — fatty. The fat taste is hidden in a bite of steak or a dollop of olive oil — just as umami is hidden in a bite of anchovy.