Edited by Diogo B. Provete and marciel86, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Rich Hoyer, some rights reserved (CC BY-NC-SA), uploaded by Rich Hoyer
- 2. (c) Aurelio Molina Hernández., some rights reserved (CC BY-NC), uploaded by Aurelio Molina Hernández.
- 3. (c) Katja Schulz, some rights reserved (CC BY)
- 4. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 5. (c) juan_carlos_caicedo_hdz, some rights reserved (CC BY), uploaded by juan_carlos_caicedo_hdz
- 6. (c) Arnold Wijker, some rights reserved (CC BY-NC), uploaded by Arnold Wijker
- 7. (c) Jim Johnson, some rights reserved (CC BY-NC-ND), uploaded by Jim Johnson
- 8. (c) Julien Renoult, some rights reserved (CC BY), uploaded by Julien Renoult
- 9. (c) Adrián Afonso, some rights reserved (CC BY-NC-SA)
- 10. (c) upupamartin, some rights reserved (CC BY-NC-ND), uploaded by upupamartin
- 11. (c) Idlegrraphics, some rights reserved (CC BY-NC-SA), uploaded by Idlegrraphics
- 12. (c) Rudy Gelis, all rights reserved, uploaded by Rudy Gelis
- 13. (c) Dan Irizarry, some rights reserved (CC BY-NC-SA)
- 14. (c) Nicolas Olejnik, some rights reserved (CC BY-NC), uploaded by Nicolas Olejnik
- 15. (c) Mary Keim, some rights reserved (CC BY-NC-SA)
- 16. (c) William PERRIN, some rights reserved (CC BY-NC), uploaded by William PERRIN
- 17. (c) Steven Easley, some rights reserved (CC BY-NC), uploaded by Steven Easley
- 18. (c) Francisco Farriols Sarabia, some rights reserved (CC BY), uploaded by Francisco Farriols Sarabia
- 19. (c) Oliver Komar, some rights reserved (CC BY-NC), uploaded by Oliver Komar
- 20. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 21. (c) Eric Isley, some rights reserved (CC BY-NC)
- 22. (c) Rogelio Martínez, some rights reserved (CC BY-NC), uploaded by Rogelio Martínez
- 23. (c) Greg Bond, some rights reserved (CC BY-NC)
- 24. (c) Cletus Lee, some rights reserved (CC BY-NC-ND)
- 25. (c) Cory Campora, some rights reserved (CC BY-SA)
