Edited by Margaret Holm, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) brendan.lally, some rights reserved (CC BY)
- 2. (c) ian wetton, some rights reserved (CC BY-NC-ND)
- 3. (c) Luciano Giussani, some rights reserved (CC BY-NC-SA)
- 4. (c) Rick Leche, some rights reserved (CC BY-NC)
- 5. (c) Rick Leche, some rights reserved (CC BY-NC-ND)
- 6. (c) Dan Dzurisin, some rights reserved (CC BY-NC-ND)
- 7. (c) Mark Kilner, some rights reserved (CC BY-NC-SA)
- 8. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 9. (c) Paul Sullivan, some rights reserved (CC BY-ND)
- 10. (c) Len Blumin, some rights reserved (CC BY-NC-ND)
- 11. (c) Doug Greenberg, some rights reserved (CC BY-NC-ND)
- 12. (c) Henry T. McLin, some rights reserved (CC BY-NC-ND)
- 13. (c) Erin and Lance Willett, some rights reserved (CC BY-NC-ND)
- 14. (c) Liam O'Brien, some rights reserved (CC BY-NC), uploaded by Liam O'Brien
- 15. (c) Tatiana Bulyonkova, some rights reserved (CC BY-NC-SA)
- 16. (c) Karunakar Rayker, some rights reserved (CC BY)
- 17. (c) Allan Hack, some rights reserved (CC BY-ND)
- 18. (c) Gavan Watson, some rights reserved (CC BY-NC-SA)
- 19. (c) Jason Means, some rights reserved (CC BY-NC-ND)
- 20. (c) Len Blumin, some rights reserved (CC BY)
- 21. (c) Biopix, some rights reserved (CC BY-NC)
- 22. (c) Mike Baird, some rights reserved (CC BY)
- 23. (c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille
- 24. (c) David Baron, some rights reserved (CC BY-SA)
- 25. (c) Doris, some rights reserved (CC BY-NC-SA)
- 26. (c) BJ Stacey, some rights reserved (CC BY-NC)
- 27. (c) David Allen, some rights reserved (CC BY-NC-SA)
- 28. (c) Judith Ellen Lopez, some rights reserved (CC BY-NC)
- 29. (c) Steve Garvie, some rights reserved (CC BY-NC-SA)
- 30. (c) Rocklin Lyons, some rights reserved (CC BY-NC)
- 31. (c) sarbhloh, some rights reserved (CC BY-NC-ND)
- 32. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 33. (c) Raj Boora, some rights reserved (CC BY)
- 34. (c) Eric de Leeuw, some rights reserved (CC BY-NC-ND)
- 35. (c) Tom Benson, some rights reserved (CC BY-NC-ND)
- 36. (c) Blake Matheson, some rights reserved (CC BY-NC)
- 37. (c) Jack Wolf, some rights reserved (CC BY-ND)
- 38. (c) Stewart Ho, some rights reserved (CC BY-NC-ND)
- 39. (c) C.V. Vick, some rights reserved (CC BY-NC-ND)
- 40. (c) Pablo Caceres Contreras, some rights reserved (CC BY-NC-ND)
- 41. (c) Kenneth Cole Schneider, some rights reserved (CC BY-NC-SA)
- 42. (c) 116916927065934112165, some rights reserved (CC BY), uploaded by 116916927065934112165
- 43. (c) Nick Chill, some rights reserved (CC BY-NC-SA)
- 44. (c) Jamie Chavez, some rights reserved (CC BY-NC)
- 45. (c) Paul Cools, some rights reserved (CC BY-NC), uploaded by Paul Cools
- 46. (c) Gregory "Slobirdr" Smith, some rights reserved (CC BY-SA)
- 47. (c) dominic sherony, some rights reserved (CC BY-SA)
- 48. (c) Cullen Hanks, some rights reserved (CC BY-NC), uploaded by Cullen Hanks
- 49. (c) Gary Ashley, some rights reserved (CC BY-NC)
- 50. (c) docentjoyce, some rights reserved (CC BY)
- 51. (c) Pierre-Selim, some rights reserved (CC BY-SA)
- 52. (c) Alan Vernon, some rights reserved (CC BY)
- 53. (c) Dan Irizarry, some rights reserved (CC BY-NC-SA)
- 54. (c) Tom McC., some rights reserved (CC BY-NC-ND)
- 55. (c) Maggie.Smith, some rights reserved (CC BY-NC)
- 56. (c) jim gifford, some rights reserved (CC BY-SA)
- 57. (c) Jon. D. Anderson, some rights reserved (CC BY-NC-ND)
- 58. (c) Patricia van Casteren, some rights reserved (CC BY-NC-ND)
- 59. (c) Minette, some rights reserved (CC BY-NC)
- 60. (c) Michael Woodruff, some rights reserved (CC BY-SA)
- 61. (c) Sebastian Kruk, some rights reserved (CC BY-NC-ND)
- 62. (c) Bryant Olsen, some rights reserved (CC BY-NC)
- 63. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 64. (c) Michael Woodruff, some rights reserved (CC BY)
- 65. (c) Dave McMullen, some rights reserved (CC BY-NC-SA)
- 66. (c) Andrew Reding, some rights reserved (CC BY-NC-ND)
- 67. (c) Rick Leche - Photography, some rights reserved (CC BY-NC-ND)