Edited by Rob Denkhaus, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Erin Faulkner, some rights reserved (CC BY-NC), uploaded by Erin Faulkner
- 2. (c) Marcia Cirillo, some rights reserved (CC BY-NC)
- 3. (c) CameliaTWU, some rights reserved (CC BY-NC-ND)
- 4. (c) Conor McMahon, some rights reserved (CC BY-NC), uploaded by Conor McMahon
- 5. (c) Michael Gras, M.Ed., some rights reserved (CC BY), uploaded by Michael Gras, M.Ed.
- 6. (c) Picasa, some rights reserved (CC BY-NC-SA)
- 7. (c) Carol Foil, some rights reserved (CC BY-NC-ND)
- 8. (c) Kai Yan, Joseph Wong, some rights reserved (CC BY-NC-SA)
- 9. (c) Frank Mayfield, some rights reserved (CC BY-SA)
- 10. (c) Glen Peterson, some rights reserved (CC BY-NC-SA)
- 11. (c) Victor W Fazio III, some rights reserved (CC BY-NC), uploaded by Victor W Fazio III
- 12. (c) Danny Barron, some rights reserved (CC BY-NC-ND)
- 13. (c) Carol Jacobs-Carre, some rights reserved (CC BY-NC-ND)
- 14. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 15. (c) amy_buthod, some rights reserved (CC BY-NC-SA)
- 16. (c) Melanie Schuchart, some rights reserved (CC BY-NC), uploaded by Melanie Schuchart
- 17. (c) Bryan, some rights reserved (CC BY-NC), uploaded by Bryan
- 18. (c) Matthew High, some rights reserved (CC BY-NC)
- 19. (c) Judith Ellen Lopez, some rights reserved (CC BY-NC-SA)
- 20. (c) Gravitywave, some rights reserved (CC BY-NC-SA)
- 21. (c) Nicholas Martinez, some rights reserved (CC BY-NC), uploaded by Nicholas Martinez
- 22. (c) Debra Halter, some rights reserved (CC BY-NC), uploaded by Debra Halter
- 23. (c) Judith Ellen Lopez, some rights reserved (CC BY-NC)
- 24. (c) Victor W Fazio III, some rights reserved (CC BY-NC-ND), uploaded by Victor W Fazio III
- 25. (c) Tyler Christensen, some rights reserved (CC BY-NC), uploaded by Tyler Christensen
- 26. (c) Matt Lavin, some rights reserved (CC BY-SA)
- 27. (c) mlhradio, some rights reserved (CC BY-NC)
- 28. (c) Kenneth Bader, some rights reserved (CC BY-NC), uploaded by Kenneth Bader
- 29. (c) Linda Jo Conn, some rights reserved (CC BY-NC), uploaded by Linda Jo Conn
- 30. (c) 潘立傑 LiChieh Pan, some rights reserved (CC BY-NC-SA)
- 31. (c) Chuck Sexton, some rights reserved (CC BY-NC), uploaded by Chuck Sexton
- 32. (c) Mikael Behrens, some rights reserved (CC BY-NC), uploaded by Mikael Behrens
- 33. (c) Ben VanderWeide, some rights reserved (CC BY-NC), uploaded by Ben VanderWeide
- 34. (c) Jenny Smith, some rights reserved (CC BY-NC), uploaded by Jenny Smith
- 35. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 36. (c) western goblin, some rights reserved (CC BY-NC-SA)
- 37. (c) Jason Singhurst, some rights reserved (CC BY-NC), uploaded by Jason Singhurst
- 38. (c) Alan Weakley, some rights reserved (CC BY-NC), uploaded by Alan Weakley
- 39. (c) Sunny Fleming, some rights reserved (CC BY-NC), uploaded by Sunny Fleming
- 40. (c) Donna Pomeroy, some rights reserved (CC BY-NC), uploaded by Donna Pomeroy
- 41. (c) Eric Keith, some rights reserved (CC BY-NC), uploaded by Eric Keith
- 42. (c) CameliaTWU (off for a while), some rights reserved (CC BY-NC-ND)
- 43. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 44. (c) Liam O'Brien, some rights reserved (CC BY-NC), uploaded by Liam O'Brien
- 45. (c) Bob O'Kennon, some rights reserved (CC BY-NC), uploaded by Bob O'Kennon
- 46. (c) Belinda Lo, some rights reserved (CC BY-NC-SA)
- 47. (c) mari_y, some rights reserved (CC BY-NC)
- 48. (c) Anna Livia Singer, some rights reserved (CC BY-NC-ND), uploaded by Anna Livia Singer
- 49. (c) Josh*m, some rights reserved (CC BY-NC-SA)
- 50. (c) Dr. Alison Northup, some rights reserved (CC BY), uploaded by Dr. Alison Northup
- 51. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 52. (c) oddharmonic, some rights reserved (CC BY-SA)
- 53. (c) Ryan McDaniel, some rights reserved (CC BY-NC), uploaded by Ryan McDaniel
