Acknowledgments

Acknowledgments, continued from page ii

NASA: Cover image and the background image of the title page of Mars by Elaine Landau are from NASA.

The Perseus Books Group: Cover of ARE WE MOVING TO MARS? by Anne Schraff. Copyright © 1996 by John Muir Publications, a division of The Perseus Books Group. All rights reserved.

Rand McNally & Company: Cover of RAND MCNALLY QUICK REFERENCE WORLD ATLAS copyright © 1995 by Rand McNally & Company. All rights reserved.

Scholastic Library Publishing, Inc.: Mars by Elaine Landau. All rights reserved. Reprinted by permission of Franklin Watts an imprint of Scholastic Library Publishing, Inc.

Time Inc.: Cover of TIME FOR KIDS, September 13, 1996, Vol. 2, No. 1. Copyright © 1996 Time Inc. All rights reserved.

World Almanac Education Group, Inc.: Cover of the WORLD ALMANAC FOR KIDS 2008. Copyright © 2007 World Almanac Education Group. All Rights Reserved. Used by permission.

World Book, Inc.: The World Book Encyclopedia. © 2008. World Book, Inc. By permission of the publisher. www.worldbookonline.com.

Photographs

Cover (tc) argus/Shutterstock. (ml - mr) Stuart Westmorland/Corbis. Christophe Boisvieux/Corbis. Clive Nichols/Corbis. Charlie Munsey/Corbis. Andrejs Pidjass/Shutterstock. Frans Lanting/Corbis. 2 (bg) Cartesia. (tl, tr, bc, c, tc) Liz Garza-Williams. 4 (bg) Liz Garza-Williams. 5 (t) David Young-Wolff/PhotoEdit. (tl, tc, tr, b) Liz Garza-Williams. (ml, mc) Digital Studios. (mr) New Century Graphics. 6 (t, l, c, r) Liz Garza-Williams. 7 (t, l, r) Liz Garza-Williams. 8 (bg) New Century Graphics. 9 (bg) Liz Garza-Williams. (br) Micheal Simpson/Getty Images. 10 (b) Urban CGI/Alamy. 10–11 (bg) Creatas/Jupiterimages. 12 (t) Liz Garza-Williams. 14 (bg) Ellen Denuto/Getty Images. (bl) New Century Graphics. (br) Ancil Nance/Getty Images. 16 (mr) Liz Garza-Williams. 16–17 (bg) YinYang/iStockphoto. 17 (tl, br) Liz Garza-Williams. (bl, bml) Siede Preis/PhotoDisc/Getty Images. (bmr) Digital Studios. 18 (t) Liz Garza-Williams. 19 (l) Artville Produce. 20 (c) Baerbel Schmidt/Getty Images. 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(ml) iStockphoto. 52 (r) E. Jane Armstrong/Jupiterimages. (b) Tim Hill/Alamy. (t) Jonathan Kantor/Getty Images. 52–53 (bg) Getty Images/Nordic Photos. 53 (t) Hugh Threlfall/Alamy. (b) Getty Images/Purestock. 54 (tl, tml, tmr, br) Image Source/Jupiterimages. (bl) Tom Bean/Corbis. (tr) Lew Robertson/FoodPix/Jupiterimages. 55 (tl) Stockbyte/Alamy. (tml) Lee Hacker/Alamy. (tc) Maximilian Stock Ltd/Corbis. (tmr) Digital Vision/Alamy. (b) Rosemary Calvert/Getty Images. (r) SuperStock. (l) Wayne Hutchinson/Alamy. 56 (tl) Burazin/Getty Images. (tml) iStockphoto. (tr) Getty Images/Foodcollection. (tmr) Stockbyte/Alamy. (tc) PhotoDisc/Getty Images. (bl) Inga Spence/Visuals Unlimited. (br) Getty Images/StockFood. 57 (tl) MaRoDee Photography/Alamy. (tc) Image Source/Jupiterimages. (c) David Young-Wolff/PhotoEdit. (br) Getty Images/StockFood. (tr) Jostein Hauge/iStockphoto. (tmr) Kevin Russ/iStockphoto. (tml) PureStock/Jupiterimages. 58 (bl) Lynda Richardson/Corbis. (tml) Getty Images/StockFood. 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(mr) Jose Luis Pelaez Inc./Corbis. 70–71 (bg) Mark Garlick/Photo Researchers Inc. 72 (t) Ales Fevzer /Corbis. 74 (l to r, bmr) PhotoDisc/Getty Images. (b) John Paul Endress. (r) Digital Stock. (mc) Tony Freeman/PhotoEdit. (ml) Stockbyte/Getty Images. (tl) Kevin Laubacher/Getty Images. (bl) David Frazier/Corbis. 76 (br) Rudi Von Briel/PhotoEdit. (l) John Paul Endress. 76–77 (bg) Superstudio/Getty Images. 77 (c) Mark Weiss/Getty Images. 78 (t) Rudi Von Briel/PhotoEdit. 79 (tl, c) New Century Graphics. (tc, tr, tmr, mr) Liz Garza-Williams. 80 (t, c) Grant Faint/Getty Images. (b) Corbis. 81 (tl) Will Hart/PhotoEdit. (tr) Ken Lucas/Visuals Unlimited. (ml) James L. Amos/Corbis. (mr) Michael Newman/PhotoEdit. (bl) Richard T. Nowitz/Corbis. 82–83 (bg) Bill Hatcher/National Geographic Image Collection. 84 (ml) Grant Faint/Getty Images. (tr) Theo Allofs/Visuals Unlimited. 85 (tr) Ken Lucas/Visuals Unlimited. (b) Pat O’Hara/Corbis. 86 (bl) Tom Bean/Corbis. 87 (tr) Robert Marien/Corbis. 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