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  1. Brushite Crystals, SEM
  2. Mosquito Wing, Macrophotograph
  3. A rock dove, Columba livia, from the Gladys Porter Zoo
  4. Butterfly Wing Scales, Light Micrograph
  5. The tree pose, Vriksasana
  6. American flamingos, Phoenicopterus ruber, at the Lincoln Children's Zoo
  7. Comparison Of A Normal Eye And An Eye With Hyperopia
  8. Molar tooth
  9. Lisianthus Pollen, SEM
  10. The tree pose, Vriksasana
  11. The standing bow pose, Dandayamana Dhanurasana
  12. Vintage World War II poster featuring bombs falling
  13. Bush in desert with landscape in background.
  14. Planet Earth Showing Americas, Half Night And Half Day With City Lights
  15. Breaking Dawn Indian War Horse
  16. A great hornbill, Buceros bicornis, at the Houston Zoo
  17. A Madagascar buzzard, Buteo brachypterus, at the Tsimbazaza Zoo
  18. A sandhill crane, Grus canadensis, preening at the Sutton Avian Research Center
  19. A Saint Vincent parrot, Amazona guildingii, at the Houston Zoo
  20. A lesser necklaced laughingthrush
  21. Gang-gang cockatoo, Callocephalon fimbriatum
  22. Amethyst
  23. Scoliosis of the spine, artwork
  24. Craniofacial surgery approaches
  25. Football player with protective gear, football, and helmet
  26. Teeth, cross section
  27. Italy, Manziana, Roma district, Wood log burning in a fireplace
  28. Comparing the size of the gas giant Jupiter with that of the Earth
  29. A blue glassy tiger butterfly at Angkor Center for Conservation of Biodiversity
  30. A pair of Vulturine guineafowl, Acryllium vulturinum, at Lincoln Children's Zoo
  31. A southern white-faced owl, Ptilopsis granti, at the Houston Zoo
  32. An oriole blackbird, Gymnomystax mexicanus, at the National Aviary of Colombia
  33. Octacalciumphosphate Crytals, SEM
  34. Golden Damselfish Eggs Develop On A Sea Whip
  35. A Cutworm Moth
  36. Normal brain, MRI scans
  37. Shells And Starfish Scattered On Textured Surface
  38. A prothonotary warbler, Protonotaria citrea, at the Virginia Aquarium
  39. A parasitic crystalline sea star snail hosted by a blue sea star
  40. Westward stretch, Paschimottanasana
  41. Whip coral anemones, Hormathiid species in Komodo National Park, Indonesia
  42. The standing bow pose, Dandayamana Dhanurasana
  43. Sunny Day IV
  44. A southern crested caracara, Caracara plancus, at the Gladys Porter Zoo
  45. A small tube sponge crab carries its eggs under its carapace
  46. A blue-grey tanager, Thraupis episcopus, at the Miller Park Zoo
  47. An Eurasian hobby falcon, Falco subbuteo, at the Budapest Zoo
  48. Composite of 110 different species of ducks and geese