Your body is built to move.Lizzy Rockwell explains how your bones and muscles, heart and lungs, nerves and brain all work together to keep you on the go. Kids walk and skate and tumble through these pages with such exuberance that even sprouting couch potatoes will want to get up and bounce around—and that’s the ultimate goal. Studies show that American kids are becoming more sedentary and more overweight and that they carry these tendencies with them into adolescence and adulthood. Experts agree that we need to help kids make physical activity a life-long habit. Through education, information, and encouragement, this book aims to inspire a new generation of busy bodies!

    Flies are so much cooler! They flap their wings 200 times a second, compared to a butterfly's measly five to twelve times. Their babies—maggots—are much cuter than caterpillars (obviously). And when they eat solid food, they even throw up on it to turn it into a liquid. Who wouldn't want to study an insect like that?In an unforgettably fun, fact-filled presentation, this lovable (and highly partisan) narrator promotes his species to a sometimes engrossed, sometimes grossed-out, class of kids.

    Bestselling authors and acclaimed astrophysicists Neil deGrasse Tyson, Michael A. Strauss, and J. Richard Gott take readers on an unforgettable journey of exploration to reveal how our universe actually works.Propelling you from our home solar system to the outermost frontiers of space, this book builds your cosmic insight and perspective through a marvelously entertaining narrative. How do stars live and die? What are the prospects of intelligent life elsewhere in the universe? How did the universe begin? Why is it expanding and accelerating? Is our universe alone or part of an infinite multiverse? Exploring these and many other questions, this pocket-friendly book is your passport into the wonders of our evolving cosmos.

    "A good introduction to the subject."––BL. 1994 "Pick of the Lists" (ABA)Outstanding Science Trade Books for Children 1995 (NSTA/CBC)

    Even after more than three centuries and the revolutions of Einsteinian relativity and quantum mechanics, Newtonian physics continues to account for many of the phenomena of the observed world, and Newtonian celestial dynamics is used to determine the orbits of our space vehicles.This completely new translation, the first in 270 years, is based on the third (1726) edition, the final revised version approved by Newton; it includes extracts from the earlier editions, corrects errors found in earlier versions, and replaces archaic English with contemporary prose and up-to-date mathematical forms. Newton's principles describe acceleration, deceleration, and inertial movement; fluid dynamics; and the motions of the earth, moon, planets, and comets. A great work in itself, the Principia also revolutionized the methods of scientific investigation. It set forth the fundamental three laws of motion and the law of universal gravity, the physical principles that account for the Copernican system of the world as emended by Kepler, thus effectively ending controversy concerning the Copernican planetary system.The illuminating Guide to the Principia by I. Bernard Cohen, along with his and Anne Whitman's translation, will make this preeminent work truly accessible for today's scientists, scholars, and students.

    Illustrates the concept of big, bigger, and biggest by comparing the physical measurements of such large things as a blue whale, a mountain, a star, and the universe.

    From enthusiasts to those who have just been introduced to the beautiful world of photography, knowing the craft and equipment is essential. This little comprehensive guide for beginners will take you on an amazing journey of discovering how wonderful Digital Photography is and how mesmerizing the art can be. From the advantages of SLR and the importance of shutter speed, to the types of lenses and the significance of good lighting, you will soon be on your journey to capturing the most stunning pictures and a kaleidoscope of dazzling sights to be eternalized. Technology is ever changing and now with Digital Photography, the world can be seen in vivid colors through your art. Begin your journey right here, right now.

    Discover the incredible story of the search for life on Mars, told from the unique perspective of Curiosity, the Mars Rover sent to explore the red planet.Markus Motum's stylish illustrations and diagrams reveal how a robot travelled 350,000,000 miles to explore a planet where no human has ever been.

    Ken Robbins departs from his signature hand-tinted photography to present preschoolers with a sharp, close-up look at thirteen types of trees ablaze with color.