Edited by Ivan Phillipsen, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Raúl Álvarez Mora, some rights reserved (CC BY-NC), uploaded by Raúl Álvarez Mora
- 2. (c) icosahedron, some rights reserved (CC BY), uploaded by icosahedron
- 3. (c) J. Fernando Pío León, some rights reserved (CC BY-NC), uploaded by J. Fernando Pío León
