Animals have existed on Earth for many hundreds of millions of years. In that time they have evolved into a great variety of forms, exploiting nearly every habitat the planet has to offer. In the dark depths of the oceans, in the seemingly inhospitable Polar Regions, in the driest deserts, even within the bodies of other animals, there are animal species that have developed unique and extraordinary means of surviving and thriving. Extraordinary Animals: An Encyclopedia of Curious and Unusual Animals is an exploration of those members of the animal kingdom who possess strange and...