Hippos are one of the largest land mammals in the world! These big vegetarians prefer to spend their time in the water. Readers will enjoy learning more about hippos with exciting facts and vibrant photos.

Mambas can be either green or black. These dangerous snakes kill prey with their venomous bite. Then they swallow their prey whole! Learn more about these awesome snakes.

Did you know that the Gaboon viper snake can weigh more than 44 pounds? Meet giant snakes, venomous lizards, and other intriguing reptiles at the Smithsonian National Zoo in these first books reviewed by Smithsonian experts.

Did you know that the sand cat can survive without water? Meet gentle gazelles, screaming armadillos, and other mammals at the Smithsonian National Zoo in these first books reviewed by Smithsonian experts.

Polar bears roam the Arctic tundra searching for food. Find out how these cold weather bears stay warm and survive in their frigid environment. Learn what polar bears eat, how they care for their young, and more in Polar Bears.

Bearded dragons may not breathe fire or fly, but they are still impressive animals! These large lizards are found in Australia. They use venom to kill prey. Learn more details about these fascinating reptiles.

Did you know it might not rain cats and dogs, but it can rain fish? Ever wondered how much water is inside a cloud? Curious to find out how a cricket can be a thermometer? Discover these and over 100 other outrageous and surprising weather facts. Electrifying trivia plus a bold, bright design and lively photos will keep reluctant and struggling reader wanting more!

Tarantulas use strong jaws to catch their prey, but these big spiders aren't as dangerous as some people think! Some can even be pets! Get caught up in all the details about these hairy, silk-spinning creatures.

Rocks are all around you. They are in your house, backyard, and even your food! Rocks are grouped into types, like sedimentary, igneous, and metamorphic. Some rocks are actually minerals, and from minerals we get beautiful gemstones. This fact-filled book is perfectly designed to introduce young children to the wonders of nonfiction. A Table of Contents makes the information fun and easy-to-find.

Axolotls have gills, but they are not fish. They are amphibians! Unlike other amphibians, though, axolotls spend their whole lives in the water. With easy text and colorful photos, young readers will have fun finding out more about these unique creatures.

How much do you know about Greta Thunberg? Discover the details you want to know about this inspiring young activist. You’ll learn about the childhood, challenges, and accomplishments of this young leader in the fight against climate change.

Smoke in the air. Crackling wood. Wildfire! Get to safety, fast. Dry weather, strong winds, and careless actions can all cause forests to burn. Firefighters battle wildfires from the ground and from above. But you can be prepared! Learn about wildfires and how to prevent them, pay attention to warnings, and stay safe.