Edited by Mike Jackson and Emmett Clarkin, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) NTNU, Faculty of Natural Sciences, some rights reserved (CC BY)
- 2. (c) Christopher Michel, some rights reserved (CC BY)
- 3. (c) Jason Burrows, some rights reserved (CC BY-NC-ND)
- 4. (c) Kingfisher, some rights reserved (CC BY-SA)
- 5. (c) Nick Tepper, some rights reserved (CC BY-NC), uploaded by Nick Tepper
- 6. (c) noahgaines, some rights reserved (CC BY-NC), uploaded by noahgaines
- 7. (c) Charles Young, some rights reserved (CC BY-NC-ND)
- 8. (c) pfaucher, some rights reserved (CC BY-NC), uploaded by pfaucher
- 9. (c) chris buelow, some rights reserved (CC BY-NC)
- 10. (c) Donna Pomeroy, some rights reserved (CC BY-NC), uploaded by Donna Pomeroy
- 11. (c) Bering Land Bridge National Preserve, some rights reserved (CC BY-SA)
- 12. (c) Brian Gratwicke, some rights reserved (CC BY)
- 13. (c) Anita, some rights reserved (CC BY-NC)
- 14. (c) Gabriel Barathieu, some rights reserved (CC BY-SA)
- 15. (c) GRID Arendal, some rights reserved (CC BY-NC-SA)
- 16. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
- 17. (c) gailhampshire, some rights reserved (CC BY)
- 18. (c) Ecomare/Salko de Wolf, some rights reserved (CC BY-SA)
- 19. (c) Len2040, some rights reserved (CC BY-ND)
- 20. (c) BJ Stacey, some rights reserved (CC BY-NC)
