Chickens and many other birds have an organ called a gizzard. They use it to help grind up food since they don't have teeth. This is why some birds swallow sand or small rocks.
It's a fact.
Reflecting on these facts, I was thinking that I might not ever have eaten a gizzard. But then I discovered yet another fact: I have eaten dozens, possibly hundreds, of gizzards as a child. How can this be, you ask?
Have you ever had a chicken pupik? Aren't they delicious? Pupik generally means belly button. Well guess what? When you're talking chickens, Pupik = Gizzard. Who knew? I guess it wouldn't have taken too much thinking to realize that chickens probably don't have belly buttons.
If you needed further evidence that poultry is a controlling force in the universe, it's also a fact that the modern chicken evolved from the T. Rex. I suspect that a T Rex didn't need a gizzard, but I wonder what the modern limeduck evolved from?