Edited by Scott Loarie, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Mark Woolston, some rights reserved (CC BY-SA)
- 2. (c) Arthur Chapman, some rights reserved (CC BY-NC-SA)
- 3. (c) Neil Saunders, some rights reserved (CC BY-ND)
- 4. (c) David Midgley, some rights reserved (CC BY-NC-ND)
- 5. (c) Michael Jefferies, some rights reserved (CC BY-NC)
- 6. (c) Donald Hobern, some rights reserved (CC BY)
- 7. (c) John Tann, some rights reserved (CC BY)
- 8. (c) TexasEagle, some rights reserved (CC BY-NC)
- 9. (c) David Cook, some rights reserved (CC BY-NC)
- 10. (c) antisense, some rights reserved (CC BY-NC-SA)
- 11. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 12. (c) Eran Finkle, some rights reserved (CC BY)
- 13. (c) President and Fellows of Harvard College, some rights reserved (CC BY-NC-SA)
- 14. (c) Vanessa Ryan, some rights reserved (CC BY-NC-SA)
- 15. (c) Lorraine Phelan, some rights reserved (CC BY-NC-SA)