Students have been learning more about the animal skeleton and muscles. Bones can tell us about how muscles were attached. Muscles can tell us about what kind of movements an organisms was adapted to performing. So even with only a few key bones, we can learn a lot about an extinct animal. Teeth can reveal a lot of information too. For example, the tooth surface topography or tiny scratches on the enamel, can tell us whether an animal is/was adapted to eating fruit, leaves, grass, seeds, nuts, or meat.