9781422283363

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©2016 by Mason Crest, an imprint of National Highlights, Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, taping, or any information storage and retrieval system, without permission from the publisher. Printed and bound in the United States of America. First printing 1 3 5 7 9 8 6 4 2 Library of Congress Cataloging-in-Publication Data The science of time. pages cm. — (Science fundamentals) Includes bibliographical references and index.

ISBN 978-1-4222-3516-4 (hc) — ISBN 978-1-4222-8336-3 (ebook) 1. Time—Juvenile literature. 2. Space and time—Juvenile literature. QB209.5.S374 2017 529—dc23 2015035338

Science Fundamentals Series ISBN: 978-1-4222-3512-6

SCIENCE FUNDAMENTALS

THE SCIENCE OF ENERGY THE SCIENCE OF LIFE THE SCIENCE OF SPACE THE SCIENCE OF TIME PICTURE CREDITS Page:

4, 6, 7, 9, 10, 12, 13, 16, 18, 20, 22, 24, 30, 31, 39: Used under license from Shutterstock, Inc.; 4: koya979/Shutterstock.com; 11, 17: Wellcome Library, London; 13: Daniel M. Silva/Shutterstock.com; 18: NASA, ESA, and E. Karkoschka (University of Arizona); 23, 29: Library of Congress; 25: NASA/Bill Ingalls; 32: NASA/WMAP Science Team; 37: Stuart Monk/Shutterstock.com; 38: Aspen Photo/Shutterstock.com; 41: Danor Aharon/Shutterstock.com Vector Illustrations: 8, 15, 21, 27, 35, 43: rzarek/Shutterstock.com Background Images: 7, 15, 17, 27, 45: marivlada/Shutterstock.com; 9, 23: Yurlick/Shutterstock.com; 13, 19, 25, 29, 31, 35, 41: TairA/Shutterstock.com; 21: Mirexon/Shutterstock.com; 33, 34: vlastas/Shutterstock.com; 37: getvitamin/Shutterstock.com; 38: Digital_Art/Shutterstock.com; 43: BackgroundStore/Shutterstock.com; 46: Hayati Kayhan/Shutterstock.com