Edited by H, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) David Hill, some rights reserved (CC BY)
- 2. (c) Fyn Kynd, some rights reserved (CC BY-SA), uploaded by Fyn Kynd
- 3. (c) Jim Webber, some rights reserved (CC BY-NC-SA)
- 4. (c) bramblejungle, some rights reserved (CC BY-NC)
- 5. (c) Anita Gould, some rights reserved (CC BY-NC), uploaded by Anita Gould
- 6. (c) Mr. T in DC, some rights reserved (CC BY-ND)
- 7. (c) Lauren Sobkoviak, some rights reserved (CC BY-NC-ND)
- 8. (c) Anthony Zukoff, some rights reserved (CC BY-NC-SA)
- 9. (c) Gilles Gonthier, some rights reserved (CC BY)
- 10. (c) Judy Gallagher, some rights reserved (CC BY-SA), uploaded by Judy Gallagher
- 11. (c) E Green, some rights reserved (CC BY-NC-ND)
- 12. (c) John Triffo, some rights reserved (CC BY-NC)
- 13. (c) Tim Hite, some rights reserved (CC BY), uploaded by Tim Hite
- 14. (c) Denis Doucet, some rights reserved (CC BY-NC), uploaded by Denis Doucet
- 15. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
- 16. (c) Judy Gallagher, some rights reserved (CC BY)
- 17. (c) Yves Bachand, some rights reserved (CC BY-NC-ND), uploaded by Yves Bachand
- 18. (c) Marlo Perdicas, some rights reserved (CC BY), uploaded by Marlo Perdicas
- 19. (c) Aaron Carlson, some rights reserved (CC BY), uploaded by Aaron Carlson
- 20. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 21. (c) klass-j, some rights reserved (CC BY-NC), uploaded by klass-j
- 22. (c) Bruno Durand, some rights reserved (CC BY-NC), uploaded by Bruno Durand
- 23. (c) mwms1916, some rights reserved (CC BY-NC-ND)