Edited by Suzanne Bernard, irenebeanthesciencemachine, and Hayden Wright, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Steve Guttman, some rights reserved (CC BY-NC-ND)
- 2. (c) Jim, some rights reserved (CC BY-NC-SA)
- 3. (c) stonebird, some rights reserved (CC BY-SA)
- 4. (c) Joshua Smith, some rights reserved (CC BY-NC), uploaded by Joshua Smith
- 5. (c) Peter Zika, some rights reserved (CC BY-NC), uploaded by Peter Zika
- 6. (c) C. Mallory, some rights reserved (CC BY-NC), uploaded by C. Mallory
- 7. (c) Izabella Farr, some rights reserved (CC BY-NC), uploaded by Izabella Farr
- 8. (c) Bill Bumgarner, some rights reserved (CC BY-NC-ND)
- 9. (c) Todd Ramsden, some rights reserved (CC BY-NC), uploaded by Todd Ramsden
- 10. (c) Maria Wheeler-Dubas, some rights reserved (CC BY-NC), uploaded by Maria Wheeler-Dubas
- 11. (c) Almantas Kulbis, some rights reserved (CC BY-NC), uploaded by Almantas Kulbis
- 12. (c) t0dd, some rights reserved (CC BY-NC)
- 13. (c) Matt Lavin, some rights reserved (CC BY-SA)
- 14. (c) Svetlana Nesterova, some rights reserved (CC BY-NC), uploaded by Svetlana Nesterova
- 15. (c) TexasEagle, some rights reserved (CC BY-NC)
- 16. (c) Lena Dietz Chiasson, some rights reserved (CC BY-NC), uploaded by Lena Dietz Chiasson
- 17. (c) George F Mayfield, some rights reserved (CC BY-SA)
- 18. (c) Andreas Rockstein, some rights reserved (CC BY-SA)
- 19. no rights reserved, uploaded by Jesse Rorabaugh
- 20. (c) Erika Mitchell, some rights reserved (CC BY-NC), uploaded by Erika Mitchell
- 21. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
- 22. (c) Jenny Glenn, some rights reserved (CC BY-NC), uploaded by Jenny Glenn
- 23. (c) Shiwalee Samant, some rights reserved (CC BY-NC), uploaded by Shiwalee Samant
