Edited by Renata Leite Pitman, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Don Loarie, some rights reserved (CC BY)
- 2. (c) Katja Schulz, some rights reserved (CC BY)
- 3. (c) Monica Krancevic, some rights reserved (CC BY-NC), uploaded by Monica Krancevic
- 4. (c) Ian Boyd, some rights reserved (CC BY-NC)
- 5. (c) Walwyn, some rights reserved (CC BY-NC)
- 6. (c) Ben Sale, some rights reserved (CC BY)
- 7. (c) Mick Talbot, some rights reserved (CC BY-NC-SA)
- 8. (c) Ken-ichi Ueda, some rights reserved (CC BY)
- 9. (c) Marcello Consolo, some rights reserved (CC BY-NC-SA)
- 10. (c) bob15noble, some rights reserved (CC BY-NC), uploaded by bob15noble
- 11. (c) skitterbug, some rights reserved (CC BY), uploaded by skitterbug
- 12. (c) Liam O'Brien, some rights reserved (CC BY-NC), uploaded by Liam O'Brien
- 13. (c) Judy Gallagher, some rights reserved (CC BY), uploaded by Judy Gallagher
- 14. (c) Ryan Hodnett, some rights reserved (CC BY-SA)
- 15. (c) Carolyn Gritzmaker, some rights reserved (CC BY-NC), uploaded by Carolyn Gritzmaker
- 16. (c) Jason M Crockwell, some rights reserved (CC BY-NC-ND), uploaded by Jason M Crockwell
- 17. no rights reserved, uploaded by Jesse Rorabaugh
- 18. (c) Katja Schulz, some rights reserved (CC BY-NC)
- 19. (c) coloneljohnbritt, some rights reserved (CC BY-NC-SA)
- 20. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
- 21. (c) molanic, some rights reserved (CC BY-NC), uploaded by molanic
- 22. (c) Mike Chapman, some rights reserved (CC BY-NC)
- 23. (c) Anita Gould, some rights reserved (CC BY-NC), uploaded by Anita Gould
- 24. (c) John Flannery, some rights reserved (CC BY-SA)
- 25. (c) Judy Gallagher, some rights reserved (CC BY)
- 26. (c) cotinis, some rights reserved (CC BY-NC-SA)
- 27. (c) John Brandauer, some rights reserved (CC BY-NC-ND)
- 28. (c) John Klymko, some rights reserved (CC BY-NC), uploaded by John Klymko
- 29. (c) Gordon C. Snelling, some rights reserved (CC BY), uploaded by Gordon C. Snelling
- 30. (c) Gilles Gonthier, some rights reserved (CC BY)
- 31. (c) JerryL2008, some rights reserved (CC BY)
- 32. (c) Stuart Tingley, some rights reserved (CC BY-NC), uploaded by Stuart Tingley
- 33. (c) Steve Kerr, some rights reserved (CC BY), uploaded by Steve Kerr
- 34. (c) Lorin Timaeus, some rights reserved (CC BY), uploaded by Lorin Timaeus
- 35. (c) Ivan Pancic, some rights reserved (CC BY-NC), uploaded by Ivan Pancic
- 36. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
- 37. (c) Lee Elliott, some rights reserved (CC BY-NC-SA), uploaded by Lee Elliott
- 38. (c) David Cappaert, some rights reserved (CC BY-NC), uploaded by David Cappaert
- 39. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 40. (c) Owen Strickland, some rights reserved (CC BY-NC), uploaded by Owen Strickland
- 41. (c) Shuk Han (Nancy) Mak, some rights reserved (CC BY-NC), uploaded by Shuk Han (Nancy) Mak
- 42. (c) anneke1998, some rights reserved (CC BY-NC-SA)
- 43. (c) psweet, some rights reserved (CC BY-SA), uploaded by psweet
- 44. (c) Martha O'Kennon, some rights reserved (CC BY-NC), uploaded by Martha O'Kennon
- 45. (c) kens18, some rights reserved (CC BY-NC), uploaded by kens18
- 46. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 47. (c) Martin R. Lucas, some rights reserved (CC BY-NC), uploaded by Martin R. Lucas
- 48. (c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille
- 49. (c) Ashley M Bradford, some rights reserved (CC BY-NC), uploaded by Ashley M Bradford
- 50. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 51. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 52. (c) thesnaguy, some rights reserved (CC BY-NC-SA), uploaded by thesnaguy
- 53. (c) filiperibeiro, some rights reserved (CC BY-NC)
- 54. (c) Chuck Sexton, some rights reserved (CC BY-NC), uploaded by Chuck Sexton