To truly understand animals you have to see what lies beneath their skin both literally and figuratively, so you can better understand how they think, how they behave and how their bodies help them survive in the wild kingdom.
Inside most animals is a skeleton, which forms a support structure and keeps their bodies from becoming a blob of organs, and this skeleton can be used to identify an animal long after its flesh has been stripped from its bones.
If you fancy yourself a bit of an expert on animal anatomy then identifying the skull at the top as that of a deer should have been fairly easy, and identifying the boar skull above even easier. But is this the skull of a gorilla or a chimpanzee?