The Age of Dinosaurs began about 250 million years ago. In the beginning they were quite small but over time they evolved into the varied and fascinating creatures that captivate our imaginations today. What we know about dinosaurs is evolving, too! We've learned that some dinosaurs were good parents, that dinosaurs could grow new teeth when old ones fell out, and that most dinosaurs walked on two legs. We've even discovered that birds are modern relatives of dinosaurs!

    Explore the functions of levers, wheels, and pulleys, and learn how to lift a lion, pull a panda, and deliver a basket of bananas to a baboon birthday party!

    Now Sophie tells her story in this picture book that celebrates women in science, bugs of all kinds, and the importance of staying true to yourself.Sophia Spencer has loved bugs ever since a butterfly landed on her shoulder--and wouldn't leave--at a butterfly conservancy when she was only two-and-a-half years old. In preschool and kindergarten, Sophia was thrilled to share what she knew about grasshoppers (her very favorite insects), as well as ants and fireflies... but by first grade, not everyone shared her enthusiasm. Some students bullied her, and Sophia stopped talking about bugs altogether. When Sophia's mother wrote to an entomological society looking for a bug scientist to be a pen pal for her daughter, she and Sophie were overwhelmed by the enthusiastic response--letters, photos, and videos came flooding in. Using the hashtag BugsR4Girls, scientists tweeted hundreds of times to tell Sophia to keep up her interest in bugs--and it worked! Sophia has since appeared on Good Morning America, The Today Show, and NPR, and she continues to share her love of bugs with others.

    And then one night she saw something unusual: a comet no one had ever seen before! Miss Mitchell’s extraordinary discovery made her famous the world over and paved the way for her to become America’s first professional female astronomer. Gorgeously illustrated by Diana Sudyka, this moving picture book about a girl from humble beginnings who became a star in the field of astronomy is sure to inspire budding scientists everywhere.

    Beloved children's book author Stacy McAnulty helps Earth tell her story, and award-winning illustrator David Litchfield brings the words to life. The book includes back matter with even more interesting tidbits.

    -- Highly illustrated first reference books-- Topics are arranged thematically and provide in-depth explanations using simple language-- Contains lots of practical experiments

    Using the insights of great mathematicians and endlessly observing the sky, he succeeded in confirming two things that altered human life forever: that there are more galaxies than our own, and that the universe is always expanding. Hubble’s message to us is to find peace in the vastness of the mystery surrounding us, and to be curious. “We do now know why we are born into the world,” he said, “but we can try to find out what sort of world it is.”

    Arcella makes a grand debut; his intensely colored sculptural forms, carved from dramatic shadows, have a distinctly '30s look to them...."--Kirkus Reviews. 48 pages (all in color), 8 1/2 x 10.

    Travel with author-illustrator Thomas Locker and follow our planet's most precious resource--water--on its daily journey through our world.

    "The Measly Middle Ages" portrays life as it really was in the days when knights were bold and the peasants were revolting.

    From planets and asteroids to black holes and galaxies, every page of this captivating book reveals the secrets behind more than 100 celestial objects. Get ready to explore fun facts and exciting new scientific discoveries!For centuries, the mysteries of space have captured our imaginations. This picture book will illuminate imaginations and spark curious minds to explore the vastness of space.Take your little astronaut on a journey from our planet out into the furthest reaches of the universe! Filled with gorgeous illustrations and incredible photography, young readers will be intrigued by the detailed close-up images of each celestial body.The engaging storybook-style descriptions and simple text shed a light on facts, myths, and key discoveries about the universe. Explore the wonders of our solar system and beyond. This educational book also includes reference pages packed with fascinating information.Journey Through the Vastness of SpaceJoin us on an adventure across the universe, as we rocket to the stars! Discover 100 objects from the universe, arranged from the closest to our planet to the ones the furthest away. Storybook-style text and out-of-this-world pictures make this book perfect for an astronomical bedtime. It's also a fantastic gift for children who can't get enough of space.Grab your spacesuit and put your helmet on! Inside the pages of this adventure book, you'll find:- Beautiful illustrations and incredible photography that showcase the mysteries of space. - Discover 100 remarkable objects in the cosmos. - Engaging storybook-style descriptions that explain key discoveries about the universe.More to ExploreOnce you've discovered The Mysteries of the Universe, dive into the companion titles from this series from DK Books! The Wonders of Nature explores more than 100 items from the natural world and An Anthology of Intriguing Animals showcases animals around the world.

    Sometimes a germ catches up with you.Germs are all around you, but they are too small for you to see. Many germs are harmless, but two kinds, viruses and bacteria, can make you sick. Read and find out about germs, how they can make you sick, and how your body works to fight them off and keep you healthy.

    That is, until the day he gets a call from some Earth scientists telling him he isn’t a planet anymore! You probably wanted to meet a real planet, huh? So, Pluto takes the reader on a hilarious and informative journey through the solar system to introduce the other planets and commiserate about his situation along the way. Younger readers will be so busy laughing over Pluto’s interactions with the other planets, asteroids, moons, and even the sun, they won’t even realize just how much they’re learning about our solar system!

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    A wasp that hunts beetles nearly twice its size. The lives of fascinating creatures such as these were unknown until one man introduced them to the world.Meet Jean-Henri Fabre, one of the most important naturalists of all time. As a boy in the French countryside, Henri spent hours watching insects. He dreamed of observing them in a new way: in their own habitats. What he discovered in pursuing that dream was shocking; these small, seemingly insignificant creatures led secret lives—lives of great drama!With its lively, lyrical text and richly detailed illustrations, this intriguing picture-book biography introduces the man who would forever change the way we look at insects, bringing to life the fascinating world of dazzling beetles, ferocious wasps, and other amazing small wonders that exist all around us.