Edited by Ian Taylor, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Jack Wolf, some rights reserved (CC BY-ND)
- 2. (c) andriy, some rights reserved (CC BY-NC), uploaded by andriy
- 3. (c) Derek Bakken, some rights reserved (CC BY)
- 4. (c) Glen Peterson, some rights reserved (CC BY-NC-SA)
- 5. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 6. (c) Jen Goellnitz, some rights reserved (CC BY-NC-ND)
- 7. (c) Eric Heupel, some rights reserved (CC BY-NC)
- 8. (c) TexasEagle, some rights reserved (CC BY-NC)
- 9. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 10. (c) matlacha, some rights reserved (CC BY-NC-SA)
- 11. (c) sean.cuill, some rights reserved (CC BY)
- 12. (c) Steve Daniels, some rights reserved (CC BY-NC), uploaded by Steve Daniels
- 13. (c) anonymous, some rights reserved (CC BY-SA)
- 14. (c) Rick Leche - Photography, some rights reserved (CC BY-NC-ND)
- 15. (c) Andy Jones, some rights reserved (CC BY-NC)
- 16. (c) Mdf, some rights reserved (CC BY-SA)
- 17. (c) Dan Pancamo, some rights reserved (CC BY-SA)
- 18. (c) Ralf Nowak, some rights reserved (CC BY-NC-SA)
- 19. (c) Alejandro Bayer Tamayo, some rights reserved (CC BY-SA)
- 20. (c) Michael D Fox, some rights reserved (CC BY), uploaded by Michael D Fox
- 21. (c) Kenneth Cole Schneider, some rights reserved (CC BY-NC-SA)
- 22. (c) brendan.lally, some rights reserved (CC BY)
- 23. (c) Jeremy Meyer, some rights reserved (CC BY)
- 24. (c) Vitaliy Khustochka, some rights reserved (CC BY-NC)
- 25. (c) Mike H, some rights reserved (CC BY-NC), uploaded by Mike H
- 26. (c) Joanne Muis Redwood, some rights reserved (CC BY-NC), uploaded by Joanne Muis Redwood
- 27. (c) Eric Isley, some rights reserved (CC BY-NC), uploaded by Eric Isley
- 28. (c) Doug Greenberg, some rights reserved (CC BY-NC-ND)
- 29. (c) Maris Pukitis, some rights reserved (CC BY-NC-SA)
- 30. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 31. (c) Luciano Giussani, some rights reserved (CC BY-NC-SA)
- 32. (c) Anita Gould, some rights reserved (CC BY-NC)
- 33. (c) Henry T. McLin, some rights reserved (CC BY-NC-ND)
- 34. (c) Sergey Yeliseev, some rights reserved (CC BY-NC-ND)
- 35. (c) Josh More, some rights reserved (CC BY-NC-ND)
- 36. (c) Robin Horn, some rights reserved (CC BY-NC-ND)
- 37. (c) Mark Peck, some rights reserved (CC BY-NC-SA)
- 38. (c) Patrick Coin, some rights reserved (CC BY-NC-SA)
- 39. (c) Michael, some rights reserved (CC BY-NC-SA)
- 40. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
- 41. (c) Pedro Alanis, some rights reserved (CC BY-NC), uploaded by Pedro Alanis
- 42. (c) peterichman, some rights reserved (CC BY)
- 43. (c) Minette Layne, some rights reserved (CC BY-SA)
- 44. (c) Dakota Duff, some rights reserved (CC BY-NC), uploaded by Dakota Duff
- 45. (c) Mike Baird, some rights reserved (CC BY)
- 46. (c) Mark Kilner, some rights reserved (CC BY-NC-SA)
- 47. (c) Gavan Watson, some rights reserved (CC BY-NC-SA)
- 48. (c) Pierre-Selim, some rights reserved (CC BY-SA)
- 49. (c) Bill Carrell, some rights reserved (CC BY-NC-ND), uploaded by Bill Carrell
- 50. (c) Jamie Chavez, some rights reserved (CC BY-NC)
- 51. (c) Kakalotli, some rights reserved (CC BY-NC), uploaded by Kakalotli
- 52. (c) Lip Kee Yap, some rights reserved (CC BY-SA)
- 53. (c) Francesco Veronesi, some rights reserved (CC BY-NC-SA)
- 54. (c) Stewart Ho, some rights reserved (CC BY-NC-ND)
- 55. (c) Charles Lam, some rights reserved (CC BY-SA)
- 56. (c) Vince Scheidt, some rights reserved (CC BY-NC), uploaded by Vince Scheidt
- 57. (c) Tom Benson, some rights reserved (CC BY-NC-ND)
- 58. (c) patricia pierce, some rights reserved (CC BY)
- 59. (c) Minette Layne, some rights reserved (CC BY-NC)
- 60. (c) Ned Haight, some rights reserved (CC BY-NC-ND)
- 61. (c) andrewdawes07, some rights reserved (CC BY-NC)
- 62. (c) Alvaro Jaramillo, some rights reserved (CC BY-NC), uploaded by Alvaro Jaramillo
- 63. (c) Scott Young, some rights reserved (CC BY-NC)
- 64. (c) Cullen Hanks, some rights reserved (CC BY-NC), uploaded by Cullen Hanks
- 65. (c) Jean-Guy Dallaire, some rights reserved (CC BY-NC-ND)
- 66. (c) Becky Gregory, some rights reserved (CC BY-ND)
- 67. (c) Dawn Vornholt, some rights reserved (CC BY-NC-ND)
- 68. (c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille
- 69. (c) rbbrummitt, some rights reserved (CC BY-NC), uploaded by rbbrummitt
- 70. (c) Andrew Reding, some rights reserved (CC BY-NC-ND)
- 71. (c) Bob, some rights reserved (CC BY-NC-ND)
- 72. (c) dloarie, some rights reserved (CC BY), uploaded by dloarie
- 73. (c) Gary Ashley, some rights reserved (CC BY-NC)
- 74. (c) Mike Pennington, some rights reserved (CC BY-SA)
- 75. (c) Trisha Shears, some rights reserved (CC BY-SA)
- 76. (c) Rick Leche - Photography, some rights reserved (CC BY-NC)
- 77. (c) nigel, some rights reserved (CC BY)
- 78. (c) Jason Means, some rights reserved (CC BY-NC-ND)
- 79. (c) Joseph D Kurtz, some rights reserved (CC BY-NC), uploaded by Joseph D Kurtz
- 80. (c) p.of.c, some rights reserved (CC BY-NC)
- 81. (c) Ian Taylor, some rights reserved (CC BY-NC-SA), uploaded by Ian Taylor
- 82. (c) Rick Leche, some rights reserved (CC BY-NC-ND)