Edited by Elkin René Briceño Lara, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) barloventomagico, some rights reserved (CC BY-NC-ND)
- 2. (c) Jesús Arana, some rights reserved (CC BY-NC), uploaded by Jesús Arana
- 3. (c) Paul Bedell, some rights reserved (CC BY-SA), uploaded by Paul Bedell
- 4. (c) Ross Millikan, some rights reserved (CC BY-NC), uploaded by Ross Millikan
- 5. (c) Greg Lasley, some rights reserved (CC BY-NC), uploaded by Greg Lasley
- 6. (c) Cláudio Dias Timm, some rights reserved (CC BY-NC-SA)
- 7. (c) Ad Konings, some rights reserved (CC BY-NC), uploaded by Ad Konings
- 8. (c) Wagner Machado Carlos Lemes, some rights reserved (CC BY)
- 9. (c) filiperibeiro, some rights reserved (CC BY-NC)
- 10. (c) Ken Chamberlain, some rights reserved (CC BY-NC), uploaded by Ken Chamberlain
- 11. (c) Nelson Wisnik, some rights reserved (CC BY-NC), uploaded by Nelson Wisnik
- 12. (c) Dario Sanches, some rights reserved (CC BY-SA)
- 13. (c) RichX 915, some rights reserved (CC BY-NC), uploaded by RichX 915
- 14. (c) Lip Kee Yap, some rights reserved (CC BY-SA)
- 15. (c) Francesco Veronesi, some rights reserved (CC BY-NC-SA)
- 16. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 17. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 18. (c) Trisha Shears, some rights reserved (CC BY-SA)
- 19. (c) Paul Cools, some rights reserved (CC BY-NC), uploaded by Paul Cools
- 20. (c) Jerome Foster, some rights reserved (CC BY-NC-ND), uploaded by Jerome Foster
- 21. (c) David Monroy R, some rights reserved (CC BY-NC), uploaded by David Monroy R