Edited by Rachel Bosley and Alistair MacKenzie, M. Sc., some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Joan Costanza, some rights reserved (CC BY-NC), uploaded by Joan Costanza
- 2. (c) Ольга Курякова, some rights reserved (CC BY-NC), uploaded by Ольга Курякова
- 3. (c) Nikolay Panasenko, some rights reserved (CC BY-NC), uploaded by Nikolay Panasenko
- 4. (c) manual crank, some rights reserved (CC BY-NC-SA)
- 5. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 6. (c) Zdeňka Nováková, some rights reserved (CC BY-NC), uploaded by Zdeňka Nováková
- 7. (c) Ehoarn Bidault, some rights reserved (CC BY-NC), uploaded by Ehoarn Bidault
- 8. (c) xulescu_g, some rights reserved (CC BY-SA)
- 9. (c) Jenn Forman Orth, some rights reserved (CC BY-NC-SA)
- 10. (c) Wolfgang Jauch, some rights reserved (CC BY), uploaded by Wolfgang Jauch
- 11. (c) Priyantha Wijesinghe, some rights reserved (CC BY-NC), uploaded by Priyantha Wijesinghe
- 12. (c) Jörg Hempel, some rights reserved (CC BY-SA)
- 13. (c) cassi saari, some rights reserved (CC BY-NC), uploaded by cassi saari
- 14. (c) David Renoult, some rights reserved (CC BY-NC), uploaded by David Renoult
- 15. (c) Homer Edward Price, some rights reserved (CC BY)
- 16. (c) Marie-Ève Garon-Labrecque, some rights reserved (CC BY-NC-ND), uploaded by Marie-Ève Garon-Labrecque