Sharks and dinosaurs--we find them both alien and awe-inspiring. This book is a plunge into the Cretaceous oceans of 80 million years ago, a merciless realm ruled by the most ferocious animals ever to stalk the seas of planet Earth. More terrifying than anything known to humankind, it scarcely seems possible that these swift, massive underwater predators actually existed--but they did. The book interweaves dramatic scenes of the far, far distant past;...

Anne Schreiber's narrative about volcanoes gives readers a little of the science, a little of the history, and a lot about the action.

What was that? That's the roaring burp of a bullfrog! See that? That's the slick, shiny skin of colorful little rainforest frogs! Alive with froggy facts, this book has the coolest photos to bring kids deep into the swampy world of our amphibian amigos.

There are many kinds of storms, and they can be scary, but this overview helps readers understand how and why they happen-and shows the importance of weather in different parts of the world and out-of-this world on other planets!

Introduces animal migration and why some animals migrate, including the zebras in Botswana, the red crabs of Christmas Island, and the walruses in the Bering and Chukchi Seas.

Introduces the migration patterns of monarch butterfies, describing the vast distances they cover, why they migrate, and the dangers they face along the way.

Profiles a number of animals from around the world that live in different habitats.

Examines several animals and their great migrations, ranging in size from the army ant to the sperm whale.

Pull on your gloves and experience the science of trashology! It's all about the stuff that's thrown away: analyzing the waste produced by your school's cafeteria, understanding the decomposition rates of garbage bags, comparing the cost effectiveness of one-use batteries versus rechargeables.