مصدر الصوَر

الصوَر مُدرَجة بحسب ترتيب الظهور في الصفحة

58.‎ ‏:American Museum of Natural History,‎ New York,‎ courtesy of

E.‎ R.‎ Degginger,‎ 144 )1(.‎/‏Animals Animals ‏;143 ‏:New York OSF,‎‏/Animals Animals

210 )2(,‎ 213 )3(.‎ ‏:Reproduced by courtesy of the Trustees of the British Museum ‏;(1) 219 210 )1(,‎ 213 )1( )2(,‎ ‏:British Museum,‎ London,‎ courtesy of

212 )2(.‎ ‏:French National Museums,‎ Louvre Museum,‎ Paris

12,‎ 13.‎ ‏:1982 Ira Block/THE IMAGE BANK,‎ New York ©

67.‎ ‏:Kentucky Department of Travel Development

69 )2(.‎ ‏:Land Management,‎ Bureau of,‎ Washington,‎ D.‎C.‎

11,‎ 128,‎ 186 )2(.‎ ‏:National Aeronautics and Space Administration,‎ Washington,‎ D.‎C.‎

126 )1( )2(,‎ 224 )1(,‎ 225 )4(.‎ ‏:National Archives,‎ Washington,‎ D.‎C.‎

64 )1( Chukchi Imuruk.‎ ‏:National Park Service,‎ Washington,‎ D.‎C.‎

4 )1( and 69 )4( Brandy Clymire.‎ ‏:National Zoological Park,‎ Washington,‎ D.‎C.‎

54,‎ 68.‎ ‏:Outdoor Pictures,‎ Washington State ©

203 Photo Number 83-2259.‎ ‏:Smithsonian Institution,‎ Washington,‎ D.‎C.‎

3 )3( Dean Biggins,‎ 4 )2( William Hartgroves,‎ 63 )2( Dean Biggins )3( Glen Smart,‎ 64 )2( Dean Biggins )3( Dan Pfitzer,‎ 68 )4( William Hartgroves,‎ 69 )1( )3( Dean Biggins.‎ ‏:U.‎S.‎ Fish & Wildlife Service,‎ Washington,‎ D.‎C.‎

225 )1(.‎ ‏:U.‎S.‎ Geological Survey,‎ Washington,‎ D.‎C.‎

220.‎ ‏:Walters Art Gallery,‎ Baltimore

224 )2( W.‎ Cutting,‎ 225 )2( Eric Schwab.‎ ‏:World Health Organization