Boa constrictors and grizzly bears are top predators in their native habitats. Imagine these two ferocious wild animals from different parts of the world battling each other! That's just what readers are invited to do in this high-interest volume, which highlights many important elementary science concepts. They'll find out the adaptations of each beast that keep them at the top of their food chain. After weighing the evidence, some of it quite surprising, the reader becomes the judge in this epic battle.