Edited by Silas Eckhardt, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) kim fleming, some rights reserved (CC BY-NC-SA)
- 2. (c) Jonathan (JC) Carpenter, some rights reserved (CC BY-NC), uploaded by Jonathan (JC) Carpenter
- 3. (c) Ken-ichi Ueda, some rights reserved (CC BY)
- 4. (c) Jimmy Dee, some rights reserved (CC BY-SA), uploaded by Jimmy Dee
- 5. (c) Scott Cox, some rights reserved (CC BY-NC-ND)
- 6. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 7. (c) Amelia Ryan, some rights reserved (CC BY-NC), uploaded by Amelia Ryan
- 8. (c) C. Mallory, some rights reserved (CC BY-NC), uploaded by C. Mallory
- 9. (c) sea-kangaroo, some rights reserved (CC BY-NC-ND), uploaded by sea-kangaroo
- 10. (c) Zack Abbey, some rights reserved (CC BY), uploaded by Zack Abbey
- 11. (c) jeco, some rights reserved (CC BY-NC-SA)
- 12. (c) Mike Quinn, Austin, TX, some rights reserved (CC BY-NC), uploaded by Mike Quinn, Austin, TX
- 13. (c) jim_carretta, some rights reserved (CC BY-NC), uploaded by jim_carretta
- 14. (c) FreckLes, some rights reserved (CC BY-NC), uploaded by FreckLes
- 15. (c) Bob O'Kennon, some rights reserved (CC BY-NC), uploaded by Bob O'Kennon
- 16. (c) Darin J McGuire, some rights reserved (CC BY), uploaded by Darin J McGuire
- 17. (c) Valtierra, some rights reserved (CC BY-NC-ND), uploaded by Valtierra
- 18. (c) joshuasexton, some rights reserved (CC BY-NC-ND), uploaded by joshuasexton
- 19. (c) ellen hildebrandt, some rights reserved (CC BY-NC), uploaded by ellen hildebrandt
- 20. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 21. (c) Evan M. Raskin, some rights reserved (CC BY), uploaded by Evan M. Raskin
