Edited by Jeny Davis, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) sankax, some rights reserved (CC BY-NC)
- 2. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
- 3. (c) desmodus60, some rights reserved (CC BY-NC), uploaded by desmodus60
- 4. no rights reserved, uploaded by Jesse Rorabaugh
- 5. (c) Melanie Schuchart, some rights reserved (CC BY-NC), uploaded by Melanie Schuchart
- 6. (c) Heather Holm, some rights reserved (CC BY-NC), uploaded by Heather Holm
- 7. (c) Lena Zentall, some rights reserved (CC BY-NC), uploaded by Lena Zentall
- 8. (c) cotinis, some rights reserved (CC BY-NC-SA)
- 9. (c) Carlos G Velazco-Macias, some rights reserved (CC BY-NC), uploaded by Carlos G Velazco-Macias
- 10. (c) Molly Jacobson, some rights reserved (CC BY-NC), uploaded by Molly Jacobson
- 11. (c) selwynq, some rights reserved (CC BY-NC)
- 12. (c) Bob McDougall, some rights reserved (CC BY-NC), uploaded by Bob McDougall
- 13. (c) L. Shyamal, some rights reserved (CC BY-SA)
- 14. (c) Ricardo Arredondo T., some rights reserved (CC BY-NC), uploaded by Ricardo Arredondo T.
- 15. (c) A. Jaszlics, some rights reserved (CC BY-NC)
- 16. (c) Denis Doucet, some rights reserved (CC BY-NC), uploaded by Denis Doucet
- 17. (c) laurenjansensimpson, some rights reserved (CC BY-NC), uploaded by laurenjansensimpson
- 18. (c) quoll2, some rights reserved (CC BY-NC)
- 19. (c) Don Loarie, some rights reserved (CC BY)
- 20. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 21. (c) BJ Stacey, some rights reserved (CC BY-NC), uploaded by BJ Stacey
- 22. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 23. (c) Todd Fitzgerald, some rights reserved (CC BY-NC), uploaded by Todd Fitzgerald
- 24. (c) Peggy Romfh, some rights reserved (CC BY-NC), uploaded by Peggy Romfh
- 25. (c) Patrick Coin, some rights reserved (CC BY-NC-SA)
- 26. (c) Marcello Consolo, some rights reserved (CC BY-NC-SA)
- 27. (c) Judy Gallagher, some rights reserved (CC BY-SA), uploaded by Judy Gallagher
- 28. (c) Kenneth Lorenzen, some rights reserved (CC BY-NC), uploaded by Kenneth Lorenzen
- 29. (c) JJ Harrison, some rights reserved (CC BY-SA)
- 30. (c) Katja Schulz, some rights reserved (CC BY)
- 31. (c) Bug's eyes photography, some rights reserved (CC BY-NC-ND), uploaded by Bug's eyes photography
- 32. (c) whrenwraith, some rights reserved (CC BY-NC)
- 33. (c) Vlad Proklov, some rights reserved (CC BY-NC)
- 34. (c) Wynand Uys, some rights reserved (CC BY), uploaded by Wynand Uys
- 35. (c) suncana, some rights reserved (CC BY), uploaded by suncana
- 36. (c) Ryosuke Kuwahara, some rights reserved (CC BY-NC), uploaded by Ryosuke Kuwahara
- 37. (c) Arnold Wijker, some rights reserved (CC BY-NC), uploaded by Arnold Wijker
- 38. (c) Mike Quinn, Austin, TX, some rights reserved (CC BY-NC), uploaded by Mike Quinn, Austin, TX
- 39. (c) Rich Hoyer, some rights reserved (CC BY-NC-SA), uploaded by Rich Hoyer
- 40. (c) Hans Böckler, some rights reserved (CC BY-NC), uploaded by Hans Böckler
- 41. (c) Laura Gaudette, some rights reserved (CC BY), uploaded by Laura Gaudette
- 42. (c) Karl Kroeker, some rights reserved (CC BY-NC), uploaded by Karl Kroeker