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  1. Queen Victoria's Agave (Agave victoriae-reginae), Saguaro National Park, Arizona
  2. Rose (Rosa sp) detail, Germany
  3. Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming
  4. Common Lime (Papilio demoleus) butterfly wing detail showing false eyespot, Asia
  5. Gum Tree (Eucalyptus sp) bark detail, Costa Rica
  6. King Penguin
  7. Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming
  8. White Rhinoceros
  9. Blue Morpho (Morpho peleides) butterfly wing, Costa Rica
  10. Churning water beside the German icebreaker Polarstern, Weddell Sea, Antarctica
  11. American Bison young bull, Grand Teton National Park, Wyoming
  12. American Bison bull, Grand Teton National Park, Wyoming
  13. Savannah Sparrow in field of Nootka Lupine, Alaska
  14. Grizzly Bear male at sunrise, Lake Clark National Park, Alaska
  15. Green Abalone shell interior from Baja California, Riedenburg, Germany
  16. Cactus spines, Saguaro National Park, Arizona
  17. Grizzly Bear (Ursus arctos horribilis) tracks on tidal flats, Alaska
  18. Eastern Grey Kangaroo joey reaching into mother's pouch
  19. Moth (Automeris zurobara) detail of false eye spot on wing, Europe
  20. Timber Wolf running in snow, Minnesota
  21. Cheetah (Acinonyx jubatus) close-up of coat showing spots, Africa
  22. Sea ice core one millimeter thick photographed under polarized light
  23. Nootka Lupine at sunset, Chugach National Forest, Kenai Peninsula, Alaska
  24. Flower petals, Germany
  25. Olive Ridley Sea Turtle female coming ashore to lay eggs, Ostional Beach, Costa Rica
  26. Aerial view of Cape May Peninsula showing rivers flowing through salt marsh, New Jersey
  27. Red-eyed Tree Frog (Agalychnis callidryas) detail of foot and eye
  28. Grizzly Bear track in mud, Lake Clark National Park, Alaska
  29. Chambered Nautilus cross-section, Riedenburg, Germany
  30. Spiny Desert Rhinoceros Chameleon (Furcifer antimena) skin of male, Madagascar
  31. Madagascar Day Gecko underside detail of foot with scales that have adhesive properties
  32. Buettikofer's Epauletted Bat hanging upside down from roost
  33. Grizzly Bear
  34. Saguaro (Carnegiea gigantea) cactus spines, Saguaro National Park, Arizona
  35. Grizzly Bear chasing salmon, Lake Clark National Park, Alaska
  36. Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming
  37. Ostrich female chasing away rival
  38. Grizzly Bear mother playing with cub, Lake Clark National Park, Alaska
  39. Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, Wyoming
  40. Young fern rolled up, highlands, Malaysian Peninsula
  41. Giraffe
  42. Panther Chameleon (Chamaeleo pardalis) male, Madagascar
  43. Nootka Lupine at sunset, Chugach National Forest, Kenai Peninsula, Alaska
  44. Yellow-bellied Slider (Trachemys scripta scripta) in pond, North America
  45. Brown-throated Three-toed Sloth
  46. Coral, Senckenberg Museum, Frankfurt, Germany
  47. Timber Wolf running in snow, Minnesota
  48. Owl Butterfly (Caligo memnon) perched upside down on tree, Costa Rica