Edited by María Begoña García, Manuel, and Ane Mujika, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Biopix, some rights reserved (CC BY-NC)
- 2. (c) Tim Waters, some rights reserved (CC BY-NC-ND)
- 3. (c) Bas Kers (NL), some rights reserved (CC BY-NC-SA)
- 4. (c) Tony Rebelo, some rights reserved (CC BY-SA), uploaded by Tony Rebelo
- 5. (c) Jukka Jantunen, some rights reserved (CC BY-NC), uploaded by Jukka Jantunen
- 6. (c) Matt Bowser, some rights reserved (CC BY), uploaded by Matt Bowser
