Edited by Martine Lapointe, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Jason Hollinger, some rights reserved (CC BY)
- 2. (c) Steve Chilton, some rights reserved (CC BY-NC-ND)
- 3. (c) Kelly Beller, some rights reserved (CC BY-NC), uploaded by Kelly Beller
- 4. (c) manual crank, some rights reserved (CC BY-NC-SA)
- 5. (c) James Bailey, some rights reserved (CC BY-NC), uploaded by James Bailey
