Did you know that today's humble chicken is related to the legendary T-Rex? Find out how, in this lively look at evolution! Now even the youngest readers will be able to understand the process of evolution and how Earth's creatures gradually transformed over millennia. Using fabulous, easy-to-follow illustrations, This Chicken Is a T-Rex! explains such fun facts as how the elephant's trunk developed and why horses' toes have transformed through time into hooves!