Why do animals have tails?

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com.Why do animals have tails? – Kristin M., age 11, Kansas City, Missouri(THE CONVERSATION) -- Scientists have found fossils of animals with tails dating back hundreds of millions of years. Back then, early fish used their fanlike tails as fins to swim through oceans and escape predators.As the