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What goes up must come down.

Everybody knows that. But what is it that pulls everything from rocks to rockets toward the center of the earth? It's gravity. Nobody can say exactly what it is, but gravity is there, pulling on everything, all the time. With the help of an adventurous scientist and his fun-loving dog, you can read and find out about this mysterious force.

Where is it partly cloudy and 860F? Venus This classic picture book is a fascinating exploration of space written by children's nonfiction veteran and former chairman of the American Museum of Natural History-Hayden Planetarium Franklyn M. Branley and illustrated by Kevin O'Malley. Full of interesting facts about the eight planets in our solar system, including our very own Earth, this bestselling book also features photographs from Voyager and other space explorers.

Now rebranded with a new cover look, this book features a find out more section with instructions for making your own...

How does a magnet work? Why does a magnet pick up a paper clip but not a leaf or a penny? How can the whole world be a magnet? Read and find out more about how magnets work

Franklyn M. Branley's classic text is seamlessly updated by NCTE Orbis Pictus Award Honoree Carolyn Cinami DeCristofano in this reissue. Now rebranded with a new cover look, this book features rich vocabulary, fascinating sidebars and diagrams by artist True Kelley, and a find-out-more section with a glossary and step-by-step instructions on how to make your own magnet and find magnetic technology in the world around...

If you lived on the moon, you would have two straight weeks of daylight and then two weeks of night On earth, we have both day and night in just twenty-four hours, thanks to the quick rotation of our planet.

Now rebranded with a new cover look, this classic picture book uses simple, fun diagrams and a guided experiment to explain what makes day and night. This book also includes a find out more section with additional activities to track nocturnal animals and to compare different times of day around the world.

This picture book is written by children's book veteran and former...

Don't jump

If you're on the space shuttle, that is. Astronauts never jump in space. They usually drink out of straws, and they lift tons of equipment as if it were light as air. Find out more in this information-packed voyage into space.

Snow is falling. Snow is wonderful - for sledding, for skiing, and for building snowmen. But did you know that snow can actually keep things warm? Find out how snow helpf plants, animals, and people to survive. But when a blizzard blows, watch out The snow that is so useful can be dangerous too.

Franklyn M. Branley and Holly Keller team up for a fun and colorful exploration of the world of snow, including experiments and activities for cold winter days. A Let's Read and Find Out Science book, for Stage 1.

Are the stars out tonight?

If they are, chances are you'll be able to spot the Big Dipper. The Big Dipper is one of the easiest constellations to recognize and this Let's-Read-and-Find-Out Science book will help young stargazers find it, and it's companion, the Little Dipper. And once you've begun to learn about the constellations, well, the sky's the limit

What is it like?
For thousands of years people looked up at the moon and wondered about it. Now we know what the moon is like. There is no air on the moon and nothing grows, but there are towering mountains and deep craters--and much more

Colder than the desert, the hotter than the desert, the moon is an amazing place to explore.

When it's not windy, it can be easy to forget about air. But air is everywhere-it fills your house, your car, and even your empty milk glass. In fact, a regular room holds about 75 pounds of it This Level 1 book, reillustrated with John O'Brien's clever, eye-catching illustrations, tells you how to discover the air that's all around you.

The sun brings heat, warmth, and energy to the Earth. What is the sun made of? How big is it? How far away? Read and find out

After rain comes down, the sun comes out and dries the puddles. But the water isn't gone. The heat from the sun has turned it into water vapor-it has evaporated. Eventually, this moisture in the air condenses to form new clouds. Soon the rain will fall again. Read on to find out all the ups and downpours of the water cycle