...The domestic dog (Canis lupus familiaris)[2][3] is a subspecies of the gray wolf (Canis lupus), a member of the Canidae family of the mammalian order Carnivora. The term "domestic dog" is generally used for both domesticated and feral varieties. The dog was the first domesticated animal[4] and has been the most widely kept working, hunting, and pet animal in human history. The word "dog" can also refer to the male of a canine species,[5] as opposed to the word "bitch" which refers to the female of the species. MtDNA evidence shows an evolutionary split between the modern dog's lineage and the modern wolf's lineage around 100,000 years ago but, as of 2013, the oldest fossil specimens genetically linked to the modern dog's lineage date to approximately 33,000–36,000 years ago.[4][6] Dogs' value to early human hunter-gatherers led to them quickly becoming ubiquitous across world cultures. Dogs perform many roles for people, such as hunting, herding, pulling loads, protection, assisting police and military, companionship, and, more recently, aiding handicapped individuals. This impact on human society has given them the nickname "man's best friend" in the Western world. In some cultures, however, dogs are also a source of meat.[7][8] In 2001, there were estimated to be 400 million dogs in the world.[9] Most breeds of dogs are at most a few hundred years old, having been artificially selected for particular morphologies and behaviors by people for specific functional roles. Through...
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...HISTORY, TENTH EDITION Published by McGraw-Hill, a business unit of The McGraw-Hill Companies, Inc., 1221 Avenue of the Americas, New York, NY 10020. Copyright © 2012 by The McGraw-Hill Companies, Inc. All rights reserved. Previous editions © 2008, 2003, and 1998. No part of this publication may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system, without the prior written consent of The McGraw-Hill Companies, Inc., including, but not limited to, in any network or other electronic storage or transmission, or broadcast for distance learning. Some ancillaries, including electronic and print components, may not be available to customers outside the United States. This book is printed on acid-free paper. 1234567890 QFR/QFR 10987654321 ISBN: 978-0-07-340696-1 MHID: 0-07-340696-1 Vice President & Editor-in-Chief: Michael Ryan Vice President EDP/Central Publishing Services: Kimberly Meriwether David Publisher: Christopher Freitag Sponsoring Editor: Matthew Busbridge Executive Marketing Manager: Pamela S. Cooper Editorial Coordinator: Nikki Weissman Project Manager: Erin Melloy Design Coordinator: Margarite Reynolds Cover Designer: Carole Lawson Cover Image: Albert Bierstadt, American (born in Germany), 1830–1902 Valley of the Yosemite, 1864 (detail) Oil on paperboard 30.16 × 48.89 cm (11 7/8 × 19 1/4 in.) Museum of Fine Arts, BostonGift of Martha C. Karolik for the M. and M. Karolik Collection of American Paintings, 1815–1865 47.1236 Buyer:...
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