171: age fotoStock; 172: J.H. Pete CarmichaelThe Image
Bank/Getty Images.
Volume 11
Page 4: SuperStock, Inc.; 5: The Granger Collection, New York;
6: Marilyn AngelWynn/Nativestock Pictures; 7: (left) Bernard Grilly
Stone/Getty Images, (right) Bob Krist/Corbis; 9: © Corbis; 10: Peter
AdamsThe Image Bank/Getty Images; 11: Yoshio Tomil/SuperStock;
13: (top) Nik Wheeler/Corbis, (bottom) © G.C. Kelley/Photo
Researchers, Inc.; 14: Terry Andrewartha/Nature Picture Library;
15: Gail ShumwayTaxi/Getty Images; 16: Encyclop.dia Britannica,
Inc.; 17: Encyclop.dia Britannica, Inc.; 18: (top) Encyclop.dia
Britannica, Inc., (bottom) Lester Lefkowitz/Corbis;
19: Camerique/Getty Images; 20: Jose Fuste Ragazefa/Corbis;
21: (left) The Granger Collection, New York, (right) Gail Shumway
Taxi/Getty Images; 22: age fotostock/SuperStock; 23: Edward
Parker/Oxford Scientific Films; 24: Encyclop.dia Britannica, Inc.;
25: Gene Ahrens/SuperStock; 26: (left) Zahid Hussein
Reuters/Corbis, (right) Mark J. Terril/AP; 27: age
fotostock/SuperStock; 28: (left) age fotostock/SuperStock, (right) Joel
SartoreNational Geographic/Getty Images; 29: Mike Read/Nature
Picture Library; 30: Georgette Douwma/Nature Picture Library;
31: Judie Anderson/EB Inc.; 32: (top and bottom, inset) Courtesy
Ronald Reagan Library; 33: The Granger Collection, New York;
34: Bettmann/Corbis; 35: Ted RussellPhotographers Choice/Getty
Images; 36: Chung Sung-Jun/Getty Images; 37: © Digital Vision/Getty
Images; 38: Shostal Associates; 39: (left) The Granger Collection, New
York, (right) Jildiz Bekibayeva/AP; 41: (left) Encyclopaedia Britannica,
Inc., (right) Pawel KopczynskiReuters/Corbis; 42: Pete
Cairns/Nature Picture Library; 44: © National Gallery Collection; by
kind permission of the trustees of the National Gallery, London/Corbis;
45: (left and right) The Granger Collection, New York; 46: Scala/Art
Resource, New York; 47: Encyclop.dia Britannica, Inc.;
48: Encyclop.dia Britannica, Inc.; 49: Encyclop.dia Britannica, Inc.;
50: Encyclop.dia Britannica, Inc.; 51: (left)Wolfgang Kaehler/Corbis,
(right) Niall Benvie/Nature Picture Library; 52: Premaphotos/Nature
Picture Library; 53: (left) Lynn M. Stone/Nature Picture Library, (right)
Seppo Sirkkaepa/Corbis; 54: (left and right) Encyclop.dia
Britannica, Inc.; 55: Encyclop.dia Britannica, Inc.; 56: (left)
Encyclop.dia Britannica, Inc., (right) © Spectrum Colour
Library/Heritage-Images; 57: © Freelance Photography Guild/Corbis;
59: StaffanWidstrand/Nature Picture Library; 61: (left) © Ira Block
National Geographic/Getty Images, (right) Bob Krist/Corbis; 62: (left)
age fotostock/SuperStock, (right) Derek Fell; 63: Baldev/Shostal
Associates; 64: SuperStock; 65: (left) NASA, (right) Peter AdamsThe
Image Bank/Getty Images; 67: (left) © Spectrum Colour
Library/Heritage-Images, (right) © Kevin Horan/Stone; 68: © City
College of San Francisco. All rights reserved. Unauthorized public
performance, broadcasting, transmission, or copying, mechanical or
electronic, is a violation of applicable laws.; 69: SuperStock; 70: age
fotostock/SuperStock; 71: (left) Lester Lefkowitz/Corbis, (right) David
Kjaer/Nature Picture Library; 72: (left) Tom Mangelsen/Nature Picture
Library, (right)William Osborn/Nature Picture Library; 73: UPI;
74: Matthew Cavanaugh/Corbis; 75: (top) Steve Vidler/SuperStock,
BRITANNICA STUDENT ENCYCLOPEDIA Credits 301
(bottom) Kirkendall/Spring; 76: (top) age fotostock/SuperStock,
(bottom) Mauritius/SuperStock; 77: Encyclop.dia Britannica, Inc.;
78: Frank MicelottaImageDirect/Getty Images; 79: Aflo/Nature
Picture Library; 80: © Francois GohierThe National Audubon
Society Collection/Photo Researchers, Inc.; 81: (left) Lori Adamski
PeekStone/Getty Images, (right) Liba Taylor/Corbis; 82: David
McNewReportage/Getty Images; 83: Denis Farrell/AP; 84: EPA
Paul Buciuta/European Commission; 85: (left) Owen Franken/Corbis,
(right) © Sandro Vannini/Corbis; 86: Kristine A. Strom; 87: age
fotostock/SuperStock; 89: Erich Lessing/Art Resource, New York;
90: Artephot/Pubbli Aer Foto; 91: Hulton Archive/Getty Images;
92: Bettmann/Corbis; 93: (inset) UPI; 94: Library of Congress,
Washington, D.C., Pach Brothers (neg. no. LC-USZ62-13026);
95: (inset) Library of Congress,Washington, D.C. ; 96: (left and right)
Encyclop.dia Britannica, Inc.; 97: age fotostock/SuperStock; 98: (top)
Dave G. Houser/Corbis, (bottom) © Richard T. Nowitz/Corbis;
99: (left) The Granger Collection, New York, (right) Tim Sloan
AFP/Getty Images; 100: Dr. P. Marazzi/Photo Researchers, Inc.;
101: (left) © Mark KauffmanTime Life Pictures/Getty Images,
(right) David Samuel Robbins/Corbis; 102: Encyclop.dia Britannica,
Inc.; 103: © Lutz Bongarts/Getty Images; 105: (left) © Ilya
NaymushinReuters/Corbis, (right) Holton Collection/SuperStock;
107: Bridgeman Art Library; 108: Hulton Archive/Getty Images;
109: © Bettmann/Corbis; 110: © Heinrich van den BergGallo
Images/Getty Images; 111: (left) Frank KrahmerPhotographers
Choice/Getty Images, (right) Hazir RekaReuters/Corbis.
Volume 12
Page 4: The Granger Collection, New York; 5: age
fotostock/SuperStock; 6: (left) Sahm Doherty/Time Life Pictures/Getty
Images, (right) © Reuters/Corbis; 7: age fotostock/SuperStock;
8: Robert EvertsStone/Getty Images; 9: © Richard Cummins/Corbis;
10: James L. Amos/Corbis; 11: Jeffrey Greenberg/Photo Researchers,
Inc.; 13: Bob Krist/Corbis; 14: Robert Harding Picture Library;
15: Kristie BullGraylock.com/AP; 16: Jim Mone/AP; 17: © Digital
Vision/Getty Images; 19: Jacques Six; 20: (left) Bob Pool
Photographers Choice/Getty Images, (right) The Granger Collection,
New York; 21: Hulton Archive/Getty Images; 22: Galen Rowell/Corbis;
23: Gene Ahrens/SuperStock; 24: Nicholas DeVore III/Bruce Coleman
Inc.; 25: Felice BeatoHistorical Picture Archive/Corbis; 26: George
Holton/Photo Researchers, Inc.; 27: (left) Bob ThomasStone/Getty
Images, (right) © Corbis; 28: (left) Jose Fuste Raga/Corbis, (right)
Wolfgang Kaehler/Corbis; 29: © Spectrum Colour Library/Heritage-
Images; 30: C. Novara/DeA Picture Library; 31: (left)
Bettmann/Corbis, (right) Jan Butchofsky-Houser/Corbis; 33: Jeremy
WoodhouseDigital Vision/Getty Images; 34: Danny Lehman/Corbis;
36: George Osodi/AP; 37: Axel SchmidtDPA/Corbis; 38: (left)
Hulton Archive/Getty Images, (right) Reuters/Corbis; 40: (left) © Bill
Stormont/Corbis, (right) Richard Heinzen/SuperStock; 41: NASA;
42: NASA/JPL; 44: (left) © Jodi CobbNational Geographic/Getty
Images, (right) KamiArabianEye/Redux; 45: Peter Macdiarmid
Reuters/Corbis; 46: Library of Congress,Washington, D.C.;
47: SPL/Photo Researchers, Inc.; 48: © Reuters/Corbis; 49: Sinclair
Stammers/Photo Researchers, Inc.; 50: (left) Ellis NeelAlamogordo
Daily News/AP, (right) Paramount/The Kobal Collection; 51: William
Dow/Corbis; 52: Bethune CarmichaelLonely Planet Images/Getty
Images; 53: Bruce ForsterStone/Getty Images; 54: Suzanne
Plunkett/AP; 55: (left) David C. TomlinsonPhotographers
Choice/Getty Images, (right) Stewart CohenStone/Getty Images;
57: (top) Danny Lehman/Corbis, (bottom) Sue Daly/Nature Picture
Library; 58: Stephen Frink/Corbis; 59: (left) Ingo Arndt/Nature Picture
Library, (right) Stephen Frink/Corbis; 60: Jurgen Freund/Nature
Picture Library; 61: Encyclop.dia Britannica, Inc.; 64: (left) © Corbis,
(right) © James KeyserTime Life Pictures/Getty Images;
65: McKenney & Hall/Library of Congress (neg. no. LC-USZ62-
67661); 66: K. Scholz/Shostal Associates; 67: Sandro Vannini/Corbis;