What can a worm or fish tell us about the human body? When it comes to biology, quite a lot actually. In many cases, scientific inquiry begins with our relatives in the animal kingdom. For thousands of years, animals have helped humans advance biomedical research. From yeast and worms to fruit flies and mice, these creatures hold clues to the secrets of our own biology. Learn how UC Davis researchers are using animal models to answer basic biological questions that will build the foundation for revolutions in human health in the new feature story "A Menagerie of Model Organisms."