Hippos and polar bears are both fairly large mammals that spend much of their time in water, but is that where their similarities end? Readers of this captivating book will find out the answer to that and many more questions as they imagine these two beasts battling it out. Colorful photographs and a dynamic page layout assist with the understanding of key elementary science concepts. After reading all the facts, readers can judge this epic battle themselves and determine which animal they think would come out on top.