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Photo Credits
- 1. (c) Dave Govoni, some rights reserved (CC BY-NC-SA), uploaded by Dave Govoni
- 2. (c) Mike Baird, some rights reserved (CC BY)
- 3. (c) Jack Wolf, some rights reserved (CC BY-ND)
- 4. (c) Francesco Veronesi, some rights reserved (CC BY-NC-SA)
- 5. (c) Julien Renoult, some rights reserved (CC BY), uploaded by Julien Renoult
- 6. (c) Mike Powers, some rights reserved (CC BY-NC-SA)
- 7. (c) Marisa Elca, some rights reserved (CC BY-NC), uploaded by Marisa Elca
- 8. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 9. (c) Erick Noe Tapia Banda, some rights reserved (CC BY-NC), uploaded by Erick Noe Tapia Banda
- 10. (c) barloventomagico, some rights reserved (CC BY-NC-ND)
- 11. (c) Blake Matheson, some rights reserved (CC BY-NC)
- 12. (c) Pablo Lèautaud, some rights reserved (CC BY-NC-ND), uploaded by Pablo Lèautaud
- 13. (c) Dominic Sherony, some rights reserved (CC BY-SA)
- 14. (c) Elena, some rights reserved (CC BY-NC), uploaded by Elena
- 15. (c) Cloned Milkmen, some rights reserved (CC BY-SA)
- 16. (c) Pablo Leautaud, some rights reserved (CC BY-NC)
- 17. (c) Rick Leche - Photography, some rights reserved (CC BY-NC-ND)
- 18. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 19. (c) Dmitry Mozzherin, some rights reserved (CC BY-NC-SA)
- 20. (c) Lip Kee Yap, some rights reserved (CC BY-SA)
- 21. (c) Heather Paul, some rights reserved (CC BY-ND)
- 22. (c) Mike Pennington, some rights reserved (CC BY-SA)
- 23. (c) Doug Greenberg, some rights reserved (CC BY-NC-ND)
- 24. (c) Isidro Vila Verde, some rights reserved (CC BY-NC)
- 25. (c) Donna Pomeroy, some rights reserved (CC BY-NC), uploaded by Donna Pomeroy
- 26. (c) tnewman, some rights reserved (CC BY-NC)
- 27. (c) Dario Sanches, some rights reserved (CC BY-SA)
- 28. (c) Jeff Nickel, some rights reserved (CC BY-NC-SA)
- 29. (c) Linda Tanner, some rights reserved (CC BY)
- 30. (c) Mikko Koponen, some rights reserved (CC BY)
- 31. (c) Luis Felipe Mayorga, some rights reserved (CC BY-NC), uploaded by Luis Felipe Mayorga
- 32. (c) Marj Kibby, some rights reserved (CC BY-NC)
- 33. (c) 116916927065934112165, some rights reserved (CC BY), uploaded by 116916927065934112165
- 34. (c) Dan Pancamo, some rights reserved (CC BY-SA)
- 35. (c) Jamie Chavez, some rights reserved (CC BY-NC)
- 36. (c) Ross Millikan, some rights reserved (CC BY-NC), uploaded by Ross Millikan
- 37. (c) Nick Chill, some rights reserved (CC BY-NC-SA)
- 38. (c) Paul Cools, some rights reserved (CC BY-NC), uploaded by Paul Cools
- 39. (c) Alex J Burchard, some rights reserved (CC BY-NC), uploaded by Alex J Burchard
- 40. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
- 41. (c) Len Blumin, some rights reserved (CC BY-NC-ND)
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- 43. (c) Brian Hinds, all rights reserved, uploaded by Brian Hinds
- 44. (c) BJ Stacey, some rights reserved (CC BY-NC)
- 45. (c) Don Loarie, some rights reserved (CC BY)
- 46. (c) Len Blumin, some rights reserved (CC BY)
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- 48. (c) Alan R. Biggs, some rights reserved (CC BY-NC-ND), uploaded by Alan R. Biggs
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- 50. (c) rodrigo alcaraz, some rights reserved (CC BY-NC), uploaded by rodrigo alcaraz
- 51. (c) Zach Baranowski, some rights reserved (CC BY-NC-ND), uploaded by Zach Baranowski
- 52. (c) Juan Jose Montero Rodriguez, some rights reserved (CC BY-NC-SA)
- 53. (c) Tomer Arazy, some rights reserved (CC BY-NC-SA)
- 54. (c) Alvaro Jaramillo, some rights reserved (CC BY-NC), uploaded by Alvaro Jaramillo
- 55. (c) Federico, some rights reserved (CC BY-NC-ND)
- 56. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 57. (c) Sean McCann, some rights reserved (CC BY-NC-SA)
- 58. (c) Jamie Drake, some rights reserved (CC BY-NC-SA)
- 59. (c) Maggie.Smith, some rights reserved (CC BY-NC)
- 60. (c) Bobby McCabe, some rights reserved (CC BY), uploaded by Bobby McCabe
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- 62. (c) Cláudio Dias Timm, some rights reserved (CC BY-SA)
- 63. (c) Bob, some rights reserved (CC BY-NC-ND)
- 64. (c) C.V. Vick, some rights reserved (CC BY-NC-ND)
- 65. (c) Geoff Coe, some rights reserved (CC BY-NC-ND)
- 66. (c) cindylemon, some rights reserved (CC BY-NC), uploaded by cindylemon
- 67. (c) world_lineage, some rights reserved (CC BY-NC), uploaded by world_lineage
- 68. (c) Wayne, some rights reserved (CC BY-NC)
- 69. (c) Isidro Vila Verde, some rights reserved (CC BY-NC-ND)
- 70. (c) Noel Reynolds, some rights reserved (CC BY)
- 71. (c) carnifex, some rights reserved (CC BY), uploaded by carnifex
- 72. (c) Vitaliy Khustochka, some rights reserved (CC BY-NC)
- 73. (c) Jim Johnson, some rights reserved (CC BY-NC-ND), uploaded by Jim Johnson
- 74. (c) Joe MDO, some rights reserved (CC BY-NC), uploaded by Joe MDO
- 75. (c) Andrew Reding, some rights reserved (CC BY-NC-ND)
- 76. (c) Alejandro Bayer Tamayo, some rights reserved (CC BY-SA)