Edited by Marco Mendoza, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
- 2. (c) Scott Buckel, some rights reserved (CC BY-NC), uploaded by Scott Buckel
- 3. (c) Juan Emilio, some rights reserved (CC BY-SA)
- 4. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 5. (c) Len Blumin, some rights reserved (CC BY)
- 6. (c) TVASQUEZ, some rights reserved (CC BY-NC), uploaded by TVASQUEZ
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- 9. (c) Nick Chill, some rights reserved (CC BY-NC-SA)
- 10. (c) Bill Carrell, some rights reserved (CC BY-NC-ND), uploaded by Bill Carrell
- 11. (c) Isidro Vila Verde, some rights reserved (CC BY-NC-ND)
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- 13. (c) jschweg, some rights reserved (CC BY-NC), uploaded by jschweg
- 14. (c) Chris Rohrer, some rights reserved (CC BY-NC), uploaded by Chris Rohrer
- 15. (c) iluro, some rights reserved (CC BY-NC), uploaded by iluro
- 16. (c) guyincognito, some rights reserved (CC BY-NC), uploaded by guyincognito
- 17. (c) Rick Leche, some rights reserved (CC BY-NC)
- 18. (c) Frans Vandewalle, some rights reserved (CC BY-NC)
- 19. (c) Mark Peck, some rights reserved (CC BY-NC-SA)
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- 21. (c) Kai Schreiber, some rights reserved (CC BY-NC-SA)
- 22. (c) Kelly Colgan Azar, some rights reserved (CC BY-ND)
- 23. (c) Jamie Chavez, some rights reserved (CC BY-NC)
- 24. (c) Francisco Caloca, some rights reserved (CC BY-NC), uploaded by Francisco Caloca
- 25. (c) Manuel Becerril González, some rights reserved (CC BY-NC), uploaded by Manuel Becerril González
- 26. (c) uzun, some rights reserved (CC BY-NC), uploaded by uzun
- 27. (c) Eric Carpenter, some rights reserved (CC BY-NC), uploaded by Eric Carpenter
- 28. (c) Francesco Veronesi, some rights reserved (CC BY-NC-SA)
- 29. (c) Kent C. Jensen, some rights reserved (CC BY-NC), uploaded by Kent C. Jensen
- 30. (c) Josh Vandermeulen, some rights reserved (CC BY-NC-ND), uploaded by Josh Vandermeulen
- 31. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 32. (c) Jerry Oldenettel, some rights reserved (CC BY-SA)
- 33. (c) Steve Thompson, some rights reserved (CC BY-NC-SA)
- 34. (c) Gonzalo Zepeda Martínez, some rights reserved (CC BY-SA), uploaded by Gonzalo Zepeda Martínez
- 35. (c) Rafael Paredes Montesinos, some rights reserved (CC BY-NC), uploaded by Rafael Paredes Montesinos
- 36. (c) Mario Castañeda, some rights reserved (CC BY-NC), uploaded by Mario Castañeda
- 37. (c) Derek Keats, some rights reserved (CC BY)
- 38. (c) Blake Matheson, some rights reserved (CC BY-NC)
- 39. (c) Dennis Church, some rights reserved (CC BY-NC-ND)
- 40. (c) Manuel Grosselet, some rights reserved (CC BY-NC), uploaded by Manuel Grosselet
- 41. (c) Ximo Galarza, some rights reserved (CC BY-NC-SA)
- 42. (c) Bonnie Kinder, some rights reserved (CC BY-NC), uploaded by Bonnie Kinder
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- 48. (c) Pablo Lèautaud, some rights reserved (CC BY-NC-ND)
- 49. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 50. (c) Pablo Lèautaud, some rights reserved (CC BY-NC-ND), uploaded by Pablo Lèautaud
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- 54. (c) rbbrummitt, some rights reserved (CC BY-NC), uploaded by rbbrummitt
- 55. (c) Mark Dennis, some rights reserved (CC BY-NC), uploaded by Mark Dennis
- 56. (c) Ismael Arellano Ciau, some rights reserved (CC BY-NC), uploaded by Ismael Arellano Ciau
- 57. (c) Kenneth Cole Schneider, some rights reserved (CC BY-NC-SA)
- 58. (c) Rafael Rodríguez Brito, some rights reserved (CC BY-NC), uploaded by Rafael Rodríguez Brito
- 59. (c) Tim Lenz, some rights reserved (CC BY-NC)
- 60. (c) Matt K, some rights reserved (CC BY-NC), uploaded by Matt K
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- 63. (c) Derek Scott, some rights reserved (CC BY-NC)
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- 65. (c) monarca, some rights reserved (CC BY-NC-SA), uploaded by monarca
- 66. (c) Pablo Leautaud, some rights reserved (CC BY-NC)
- 67. (c) Becky Gregory, some rights reserved (CC BY-ND)
- 68. (c) BlueRidgeKitties, some rights reserved (CC BY-NC-SA)
- 69. (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda
- 70. (c) Rick Leche, some rights reserved (CC BY-NC-ND)
- 71. (c) psweet, some rights reserved (CC BY-SA), uploaded by psweet
- 72. (c) Daniel Dorantes, some rights reserved (CC BY-NC), uploaded by Daniel Dorantes
- 73. (c) Mikael Behrens, some rights reserved (CC BY-NC), uploaded by Mikael Behrens
- 74. (c) Jose Antonio Aranda Pineda, some rights reserved (CC BY), uploaded by Jose Antonio Aranda Pineda