Reprinted with permission from Odd Bits: How to Cook the Rest of the Animal by Jennifer McLagan, copyright© 2011. Published by Ten Speed Press, a division of Random House, Inc.
At any given moment, there are more than 20 billion chickens on earth, says Andrew Lawler. How did one bird become so ubiquitous? The author of Why Did the Chicken Cross the World? shares seven facts from the bird's history.