Edited by Lía Altamirano and Diego F. Cisneros-Heredia, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) John Sullivan, some rights reserved (CC BY-NC), uploaded by John Sullivan
- 2. (c) President and Fellows of Harvard College, some rights reserved (CC BY-NC-SA)
- 3. (c) Brian Gratwicke, some rights reserved (CC BY)
- 4. (c) Josh Vandermeulen, some rights reserved (CC BY-NC-ND), uploaded by Josh Vandermeulen
- 5. (c) jorgebrito, some rights reserved (CC BY-NC), uploaded by jorgebrito
- 6. (c) jfoley, some rights reserved (CC BY-NC)
