Edited by Nate Venarske, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Fluff Berger, some rights reserved (CC BY-SA), uploaded by Fluff Berger
- 2. (c) manual crank, some rights reserved (CC BY-NC-SA)
- 3. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
- 4. (c) John Boback, some rights reserved (CC BY-NC), uploaded by John Boback
