Edited by Caleb Scholtens, some rights reserved (CC0)
Photo Credits
- 1. (c) Marcello Consolo, some rights reserved (CC BY-NC-SA)
- 2. (c) Walwyn, some rights reserved (CC BY-NC-SA)
- 3. (c) krancmm, some rights reserved (CC BY-NC), uploaded by krancmm
- 4. (c) Matthew O'Donnell, some rights reserved (CC BY-NC-SA), uploaded by Matthew O'Donnell
- 5. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal
- 6. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
- 7. (c) Walwyn, some rights reserved (CC BY-NC)
- 8. (c) M. Goff, some rights reserved (CC BY-NC-SA), uploaded by M. Goff
- 9. (c) Denis Doucet, some rights reserved (CC BY-NC), uploaded by Denis Doucet
- 10. (c) skitterbug, some rights reserved (CC BY), uploaded by skitterbug
- 11. (c) Liam O'Brien, some rights reserved (CC BY-NC), uploaded by Liam O'Brien
- 12. (c) Stuart Tingley, some rights reserved (CC BY-NC), uploaded by Stuart Tingley
- 13. (c) peggyo, some rights reserved (CC BY-NC), uploaded by peggyo
- 14. (c) Christophe Quintin, some rights reserved (CC BY-NC)
- 15. (c) kestrel360, some rights reserved (CC BY-NC-ND)
- 16. (c) icosahedron, some rights reserved (CC BY), uploaded by icosahedron
- 17. (c) Rob Curtis, some rights reserved (CC BY-NC-SA), uploaded by Rob Curtis
- 18. (c) molanic, some rights reserved (CC BY-NC), uploaded by molanic
- 19. (c) John Flannery, some rights reserved (CC BY-SA)
- 20. (c) Judy Gallagher, some rights reserved (CC BY)
- 21. (c) cotinis, some rights reserved (CC BY-NC-SA)
- 22. (c) Robby Deans, some rights reserved (CC BY-NC), uploaded by Robby Deans
- 23. (c) Catherine Beard, some rights reserved (CC BY-NC), uploaded by Catherine Beard
- 24. (c) Gilles Gonthier, some rights reserved (CC BY)
- 25. (c) Katja Schulz, some rights reserved (CC BY)
- 26. (c) S. Rae, some rights reserved (CC BY)
- 27. (c) Ken Schneider, some rights reserved (CC BY-NC), uploaded by Ken Schneider
- 28. (c) Victor W Fazio III, some rights reserved (CC BY-NC-ND), uploaded by Victor W Fazio III
- 29. (c) Celeste Ramsay, some rights reserved (CC BY-NC-ND)
- 30. (c) Martin Cooper, some rights reserved (CC BY)
- 31. (c) Paul Bedell, some rights reserved (CC BY-NC-SA)
- 32. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
- 33. (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda
- 34. (c) J Brew, some rights reserved (CC BY-SA), uploaded by J Brew
- 35. (c) Francisco Farriols Sarabia, some rights reserved (CC BY), uploaded by Francisco Farriols Sarabia
- 36. (c) Shuk Han (Nancy) Mak, some rights reserved (CC BY-NC), uploaded by Shuk Han (Nancy) Mak
- 37. (c) dlbowls, some rights reserved (CC BY-NC), uploaded by dlbowls
- 38. (c) Karen Yukich, some rights reserved (CC BY-NC), uploaded by Karen Yukich
- 39. (c) Jason M Crockwell, some rights reserved (CC BY-NC-ND), uploaded by Jason M Crockwell
- 40. (c) Sam Kieschnick, some rights reserved (CC BY), uploaded by Sam Kieschnick
- 41. (c) Mary Keim, some rights reserved (CC BY-NC-SA)
- 42. (c) K Schneider, some rights reserved (CC BY-NC)
- 43. (c) Steve Kerr, some rights reserved (CC BY), uploaded by Steve Kerr
- 44. (c) Mike Leveille, some rights reserved (CC BY-NC), uploaded by Mike Leveille
- 45. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
- 46. (c) Mick Talbot, some rights reserved (CC BY)
- 47. (c) Russell Pfau, some rights reserved (CC BY-NC), uploaded by Russell Pfau
- 48. (c) James K. Lindsey, some rights reserved (CC BY-SA)
- 49. (c) Nicholas Pollock, some rights reserved (CC BY-NC), uploaded by Nicholas Pollock
- 50. (c) Paul Bedell, some rights reserved (CC BY-SA), uploaded by Paul Bedell
