the taste of it all

I heard on NPR today that there were just 4 types of tastes identified for a couple of thousand years : sweet, sour, salty and bitter. Then this guy in France came up with a recipe for cooking some mixture of stuff for 24 hours and it wasn't any of those tastes...he made some sauce to put on meat.....this apparently was in the 1800's at some fancy restaurant..so now we have 5 different types of tastes.........Go listen to NPR and it will tell you the name of that 5Th taste.