 One of the signatures of what some people are calling the Anthropocene is chicken bones, because the chicken is the world's most popular bird. There are 12 billion chickens alive now, but not for long, right? There's 90 days from egg to nugget. And every year we go through 50 billion chickens and that number's only going up. So trillions of chicken bones already in the fossil record. And that's a sign that it's not a natural part of being human that there should be so many chicken bones. There's some process.