On the left, olive oil, which is low in saturated fat and high in monounsaturated fat, which may lower bad cholesterol levels. On the right, coconut oil, which is 90 percent saturated fat and may raise bad cholesterol levels.
A slice of pork belly, with a thick layer of fat. "If we confirm that fat is a basic taste quality, it's the equivalent of saying chartreuse is a primary color," Richard Mattes of Purdue University says. "It changes our basic understanding of what taste is."