Umami is the recently identified fifth taste. It is described as a savory flavor and is caused by glutamate, an amino acid. It is associated with foods like tomatoes, meat, cheese, mushrooms, and more. – WTF Fun Facts
Source: https://www.rd.com/food/recipes-cooking/13-foods-with-natural-umami/
Fun Fact – Umami Taste

not recent and the tongue thing isnt has been debunked for a long long time