So what is an animal anyway? In our inaugural episode of Crash Course Zoology, we’ll endeavor to answer just that because as it turns out, it’s complicated! But before we get there we’ll need to introduce you to zoology more broadly, tell you about taxonomy (the branch of science dedicated to naming and describing organisms), and then we’ll get to phylogenetics (which looks at traits, evolutionary history, and relationships among living things). And it’s here that we’ll finally close in on an answer: Animals eat, move, sexually reproduce, and are multicellular. Well, most of the time. Let us explain!