Why Does Some Food Taste Better as Leftovers?

(via Atlas Obscura) The strange truth about leftovers is that they often taste better the next day. It seems counter-intuitive: One would think that food tastes best when it’s most fresh. But try telling that to fans of leftovers as varied as chili, curry, and cold lasagna. Is the perceived superiority all in our heads? Or is something more scientific afoot?