There are many different types of animals on Earth. Many of these animals have
lots of things in common. Others are quite different. In comparing animals we
can look for things that are the same, and things that are different to help
us understand how these animals are related to each other. Want to learn more?
Check out our reference library section on "Animal
Comparison." For much more detailed comparison see the reference library
section on Animal Classification.
Test how much you know about animals -- how they are the same, and how they