Human: How do crocodiles and alligators differ? Assistant: 
Crocodiles are members of the family Crocodylidae. Alligators are members of the family Alligatoridae. Both families belong to the order Crocodilia, which is a group of reptiles that includes both living species and extinct ones. Crocodiles have longer snouts than alligators, and they also have more teeth. Alligators have thicker skin, and their eyes are larger.