Edited by Olga Obedkova, some rights reserved (CC BY-SA)
Photo Credits
- 1. (c) Eddi Bisulli, some rights reserved (CC BY-NC), uploaded by Eddi Bisulli
- 2. (c) Steven Severinghaus, some rights reserved (CC BY-NC-SA)
- 3. (c) Steve Chilton, some rights reserved (CC BY-NC-ND)
- 4. (c) Duarte Frade, some rights reserved (CC BY), uploaded by Duarte Frade
- 5. (c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda
- 6. (c) Jason Whittle, some rights reserved (CC BY-NC-ND), uploaded by Jason Whittle
