Edited by Giovanny Stiven Castro, and Nat S. Rojas, some rights reserved (CC BY-NC)
Photo Credits
- 1. (c) barloventomagico, some rights reserved (CC BY-NC-ND)
- 2. (c) Melissa McMasters, some rights reserved (CC BY)
- 3. (c) Edwin Harvey, some rights reserved (CC BY-NC-SA)
- 4. (c) Taran Rampersad, some rights reserved (CC BY-NC-SA)
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- 6. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
- 7. (c) Cláudio Dias Timm, some rights reserved (CC BY-NC-SA)
- 8. (c) Francesco Veronesi, some rights reserved (CC BY-NC-SA)
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- 10. (c) Andreas Kay, some rights reserved (CC BY-NC-SA)
- 11. (c) Gabby Sanabria, some rights reserved (CC BY-SA)
- 12. (c) JERRY WENG, some rights reserved (CC BY-NC-SA)
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- 14. (c) Juan Carlos Pérez Magaña, some rights reserved (CC BY-NC), uploaded by Juan Carlos Pérez Magaña
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- 19. (c) Nicolas Olejnik, some rights reserved (CC BY-NC), uploaded by Nicolas Olejnik
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- 29. (c) Claudia Komesu, some rights reserved (CC BY-NC), uploaded by Claudia Komesu
- 30. (c) lotlhmoq, some rights reserved (CC BY-NC-SA), uploaded by lotlhmoq
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- 32. (c) Dave Govoni, some rights reserved (CC BY-NC-SA), uploaded by Dave Govoni
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- 36. (c) Bobby McCabe, some rights reserved (CC BY), uploaded by Bobby McCabe
- 37. (c) Steve Garvie from Dunfermline, Fife, Scotland, some rights reserved (CC BY-SA)
- 38. (c) Arthur Chapman, some rights reserved (CC BY-NC-SA)
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- 40. (c) Len Blumin, some rights reserved (CC BY-NC-ND)
- 41. (c) Kenneth Cole Schneider, some rights reserved (CC BY-NC-SA)
- 42. (c) Cláudio Dias Timm, some rights reserved (CC BY-NC-SA)
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- 44. (c) Jeff Nickel, some rights reserved (CC BY-NC-SA)
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- 46. (c) Rafael Paredes Montesinos, some rights reserved (CC BY-NC), uploaded by Rafael Paredes Montesinos
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- 53. (c) Bruce Bennett, some rights reserved (CC BY-NC), uploaded by Bruce Bennett
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- 55. (c) Steven Mlodinow, some rights reserved (CC BY-NC), uploaded by Steven Mlodinow
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