Hippos seem to be slow, big and harmless, but don't be fooled! They are one of the most dangerous land animals in the world. Closely related to dolphins, the semiaquatic hippo is a remarkable creature in many ways.

Earth's wildlife can be charming, dangerous, frightening and surprisingly intelligent. Find out remarkable facts about the iconic animals that have inspired countless novels, works of art and movies. You will see that there is much more to them than you ever knew was possible.