Contains facts about rhinoceros and hippopotamus, comparing such aspects as their sizes, brain structure, and abilities, and describes what would happen if they had a fight.
After a natural disaster, which resulted in the loss of his family, a baby hippo named Owen is taken to a zoo, where he and Mzee the tortoise form an unusual friendship.
Humorous cartoon illustrations accompany short texts on trivia facts about animals, beginning with facts on hippos--such as the fact that they cannot swim--and ending with blue whales, which can grow up to one hundred feet long.