Earth is truly amazing! It has giant glaciers, gorgeous canyons, and it's the only planet we know of with intelligent life. Ian is exploring Earth with his tour guide, Dr. Sally. Join them as they study ocean animals, the African savanna, and the chilly South Pole. Find out more about the planet we call home.

Move to another planet? Sounds interesting! In our imaginary spaceship, let's check out the planets in our solar system. Mercury is closest, but it has no air, and it's either sizzling hot or bitterly cold. The atmosphere on Venus is poisonous; plus, human beings would cook there. Mars might work, but you'd always have to be in a protective shelter. And if you got to the outer planets, you couldn't even land as they are mostly made of gas! Our home planet is looking good. Why is Earth so comfortable for plants, animals, and people? As Robert E. Wells explains, it's because of our just-right position form the sun, marvelous atmosphere, and abundant water. Our planet is very special and perfect for us, and that's why we must do all we can to keep Earth healthy.

The internationally successful Ultimate Book series expands its scope to embrace—very appropriately—the whole world! The Ultimate Book of Planet Earth offers lots of opportunity for hands-on interaction using flaps, pop-ups, and more! Pull a tab to see how magma erupts from a volcano, turn a page for a pop-up of a mountain range, or rotate a wheel to move the blades of a wind turbine! Planet Earth explores not only the geology of the Earth—oceans, continents, and the formation of mountains and volcanoes—but also its geo graphy, atmosphere, and weather. A valuable reference book for any child!

Four people are born every second of every day. Conservative estimates suggest that there will be 10 billion people on Earth by 2050. That is billions more than the natural resources of our planet can sustain without big changes in how we use and manage them. So what happens when vast population growth endangers the world’s food supplies? Or our water? Our energy needs, climate, or environment? Or the planet’s biodiversity? What happens if some or all of these become critical at once? Just what is our future? In Tipping Point for Planet Earth, world-renowned scientists Anthony Barnosky and Elizabeth Hadly explain the growing threats to humanity as the planet edges toward resource wars for remaining space, food, oil, and water. And as they show, these wars are not the nightmares of a dystopian future, but are already happening today. Finally, they ask: at what point will inaction lead to the break-up of the intricate workings of the global society? The planet is in danger now, but the solutions, as Barnosky and Hadly show, are still available. We still have the chance to avoid the tipping point and to make the future better. But this window of opportunity will shut within ten to twenty years. Tipping Point for Planet Earth is the wake-up call we need.

"Tender and illuminating. A beautiful debut." --Rebecca Stead, Newbery Medal-winning author of When You Reach Me A heartrending and hopeful story about a nonverbal girl and her passion for space exploration, for fans of See You in the Cosmos, Mockingbird, and The Thing About Jellyfish. Twelve-year-old Nova is eagerly awaiting the launch of the space shuttle Challenger--it's the first time a teacher is going into space, and kids across America will watch the event on live TV in their classrooms. Nova and her big sister, Bridget, share a love of astronomy and the space program. They planned to watch the launch together. But Bridget has disappeared, and Nova is in a new foster home. While foster families and teachers dismiss Nova as severely autistic and nonverbal, Bridget understands how intelligent and special Nova is, and all that she can't express. As the liftoff draws closer, Nova's new foster family and teachers begin to see her potential, and for the first time, she is making friends without Bridget. But every day, she's counting down to the launch, and to the moment when she'll see Bridget again. Because as Bridget said, "No matter what, I'll be there. I promise."

An introduction to protecting our planet, with tips and ideas to show children that even small changes can make a big difference to our world.

Learn from home and explore the world with these fun and easy board books! Toddlers love to learn about the solar system. Here's a book all about our amazing planet Earth, with easy-to-understand facts about countries, continents, oceans, landforms, habitats, and Earth's place in space. Hello, World! is a series designed to introduce first nonfiction concepts to babies and toddlers. Told in clear and easy terms ("Light from the sun makes the moon shine") and featuring bright, cheerful illustrations, Hello, World! makes learning fun for young children. And each page offers helpful prompts for engaging with your child. It's a perfect way to bring science and nature into the busy world of a toddler, where learning never stops. Look for all the books in the Hello, World! series: • Solar System • Weather • Backyard Bugs • Birds • Dinosaurs • My Body • How Do Apples Grow? • Ocean Life • Moon Landing • Pets • Arctic Animals • Construction Site • Rainforest Animals • Planet Earth • Reptiles • Cars and Trucks • Music • Baby Animals • On the Farm • Garden Time • Planes and Other Flying Machines • Rocks and Minerals • Snow