A quick lesson in turkey biology: Turkeys, like chickens, lay eggs in order to reproduce. After about 28 days, those eggs hatch, and little turkeys come into the world. These turkeys eat, grow and eventually, some of them become the turkeys we eat. At no point in this process does a little baby turkey live inside another turkey. However, when you cut open a turkey on Thanksgiving, and find a chicken inside, you are sure to forget all science. In this video, they stuffed a Cornish hen into a turkey and made the people think that they cooked a pregnant bird.