Teacher-curated, self-paced courses. Looking for a guided sequence through a full topic? See Learning Paths.
A lion, a tiger and a cat look alike in many ways, and a dog is a little different. How does a biologist put this in order? In this course we climb the ranks from species to kingdom. Then we visit the tools of a taxonomist: the herbarium, the botanical garden, the museum, the zoo, and the key that finds a name step by step.