The animal kingdom is full of a variety of animals living on land, in water bodies, and the sky. But millions of years ago, massive creatures called Earth their home, yet have since gone extinct. Some of them, like the giant sloth, were generally gentle. Others, like the saber-toothed tiger, dominated their environment with their size and fearsome fangs. And there are so many more tales to tell!
Intrigued? Browse through the following gallery and discover the fascinating animals that once roamed the planet.