Today in biology we studied different skulls. We had to figure out who these skulls belonged too and if they were a carnivore, mammal, herbivore ... It sounds easy but telling a mouse and a rat apart is not so easy. Deciding weather it is an omnivore, or the teeth were just ground down a little and could still be a carnivore. It is very tedious work, some skulls look like nothing I have never seen. There are also many categories that are very similar.