I saw this crazy special last night on Terror Birds, which lived about 2 million years ago. We talk about chickens being related to dinosaurs, which they are, but these guys were much more recent and very scary! They grew to 7 feet tall, weighed up to 300lbs and could run up to 30mph. http://www.wired.com/wiredscience/2010/08/terrorbird/ Just had to share, I thought it was very cool. I was looking at my cute little chickens a bit differently this morning!