There’s more than just dirt below! Readers will learn about the layers and types of soil underground. Rocks, clay, sand, silt and all nonliving things underground are explored. Earth's core, mantle, and crust are also discussed. Readers will also discover why we could not live without dirt, and why we need to protect it.

Did you know that some pets eat poop? It's true. And there's even one pet that will eat its own tank mates! Learn more about the gross things pets do and why they do them. You'll never look at your pets the same way again!

Polar bears look cuddly, but beware! Their curved claws, powerful jaws, and jagged teeth all help them attack and kill prey. Discover how the world’s biggest land predator finds its next meal.

When it comes to battle, some animals seem to be natural warriors. They may have spines or armor to fend off predators, or horns made to attack. Enemies that mess with these animals are in for an unpleasant surprise.

Did you know that some animals use poop to cool off? It's true. And there's even an animal that uses poop to defend itself! Learn more about the gross things animals do and why they do them. The zoo will never be the same!

Many people believe hyenas are only scavengers, eating food that other predators leave behind. But more often, hyenas use their sharp teeth and powerful jaws to hunt live prey. Learn how this fast, clever animal finds its next meal.

Pounce! A puma springs from the shadows and leaps on its prey. Its powerful claws and sharp teeth do the rest. Learn how these sleek wildcats stalk and find their next meal.

When these animals face a dangerous situation, they either run away, stay and fight, or hide from sight. Find out which of your favorite animals are masters of speed, strength, and stealth.

Did you know that some bugs eat blood or poop? It's true. And there's even a kind of bug that eats boogers! Learn more about the gross things bugs do and why they do them. The backyard will never look the same!

Did you know that your body is home to more than 32 million kinds of germs? They live on your feet, in your nose, and even in your mouth! Learn more about the gross things your body does and why it does them. You'll never look at yourself the same way again!

Wrasses that can change from female to male! Anglerfish that glow under the sea! Some fish have found extreme ways to adapt to their environments. Discover some of the most interesting and unusual adaptations in fish that have allowed them to survive all over the world.

Oceans are an important part of the Earth. Filled with millions of species of life, human actions have put this important ecosystem in danger. Why are oceans so important to humans? Why should we change our actions to help protect them? Endangered Oceans answers these questions by engaging readers with lively text, graphic features, and stunning photography. Readers will learn about the vast life within the ocean and the part they can play in protecting it.