Your Digestive System

The digestive system is made up of the tongue, the esophagus, the stomach, the intestines, and other parts. But what does the digestive system do? And how do its parts work...

Your Muscular System

The muscular system is made up of three different kinds of muscles: skeletal muscles, smooth muscle, and heart muscle. But what does each kind of muscle do? And where in the body...

A Walk in the Tundra, 2nd Edition

Take a walk in the tundra. In this cold, harsh biome at the top of the world, summer is short. Carpets of wildflowers and grasses bloom in the bright sunlight. An arctic fox pup...

A Walk in the Deciduous Forest, 2nd Edition

Take a walk in the deciduous forest. Sunlight filters through new green leaves. It's early summer, and squirrels are chattering in the treetops. A warbler calls out. She's...

Journey into the Deep Discovering New Ocean Creatures

Have you ever wondered what mysteries the ocean holds? Prepare to explore the ocean from sunlit shallows to the deepest, darkest depths. Along the way, you'll meet many incredible...

A Walk in the Prairie, 2nd Edition

Take a walk in the prairie. This land of all grass and open sky is full of life. You can hear the warbling song of a meadowlark. At your feet, a grasshopper munches on a flower...

When Lunch Fights Back Wickedly Clever Animal Defenses

The octopus spies a nice, tasty mantis shrimp. It swims over for a closer look at the small creature. Then—WHAM!—the mantis shrimp strikes a nasty blow with its hammer-like...

Nature's Ninja Animals with Spectacular Skills

Did you know that some animals have natural ninja-like talents? In this book, you'll learn all about them, including geckos, sea urchins, bombardier beetles, and more. For...

Zombie Makers True Stories of Nature's Undead

Are zombies real? As far as we know, dead people do not come back to life and start walking around, looking for trouble. But there are things that can take over the bodies and...

A Walk in the Rain Forest, 2nd Edition

Take a walk in the rain forest. It's hot and humid and humming with life. Look up into the dense canopy of leaves above you. Tangled vines lead to the treetops, where parrots...

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