Edited by Rachel Bosley and Alistair MacKenzie, M. Sc., some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Sean Blaney, some rights reserved (CC BY-NC), uploaded by Sean Blaney
- 2. (c) Erika Mitchell, some rights reserved (CC BY-NC), uploaded by Erika Mitchell
- 3. (c) Sarah, some rights reserved (CC BY-SA)
- 4. (c) Michael Ellis, some rights reserved (CC BY), uploaded by Michael Ellis
- 5. (c) Ivar Leidus, some rights reserved (CC BY-SA)
- 6. (c) Anita, some rights reserved (CC BY-NC)
- 7. (c) CatherineK, some rights reserved (CC BY-SA), uploaded by CatherineK
- 8. (c) Jason Headley, some rights reserved (CC BY-NC), uploaded by Jason Headley
- 9. (c) tapaculo99, some rights reserved (CC BY-NC), uploaded by tapaculo99
- 10. (c) cassi saari, some rights reserved (CC BY-NC), uploaded by cassi saari
- 11. (c) sheoftheplants, some rights reserved (CC BY-NC)
- 12. (c) Charles Wohlers, some rights reserved (CC BY-NC-ND)
- 13. (c) agbelliveau, some rights reserved (CC BY-NC), uploaded by agbelliveau
- 14. (c) Kerry Woods, some rights reserved (CC BY-NC-ND)
- 15. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 16. (c) Anita363, some rights reserved (CC BY-NC-SA), uploaded by Anita363
- 17. (c) Joshua Mayer, some rights reserved (CC BY-SA)
- 18. (c) Jeff Skrentny, some rights reserved (CC BY-NC), uploaded by Jeff Skrentny
- 19. (c) sydcannings, some rights reserved (CC BY-NC), uploaded by sydcannings
- 20. (c) aarongunnar, some rights reserved (CC BY), uploaded by aarongunnar