By today’s standards, it’s always sad when you learn an animal no longer exists in the wild – like we’re losing something great in the environment because of it. Extinction is seen as a terrible end to any creature – and we should be working towards preserving that species as best we can. However, there sure were some that we’re glad went extinct long ago. From massive monsters to powerful predators, these are everything that haunts our dreams to this day. Some were long gone before humans, and some of them might have shared hunting spaces.