What is the biggest living thing right now? In this book, you'll find that the answer to that question can be found on land, in the sky, and in the seas. Let's discover the mega-sized, mega-cool creatures living on Earth today and learn what makes them so amazing! The MegaCool MegaFauna series explores the history of some of the most massive creatures that ever lived. They swam in the seas, walked the lands, and soared through the skies. Some are even still alive today! Learn how mega-cool megafauna are related to (or are even examples of) modern living things. These awesome extra-large animals have an amazing history, so let's start exploring.