People have been finding fossils for thousands of years. When scientists found claws that were 3 feet long, they thought they had found a massive turtle. After more bones were found, they realized that the claws belonged to a dinosaur that weighed more than 10,000 pounds! What other mega-sized, mega-cool creatures roamed ancient lands millions of years ago? Let's explore MEGA Creatures of Ancient Lands! 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.