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  1. Vintage Parchment Otoscope Patent Print
  2. Johannes Kepler and Tycho Brahe
  3. 4d electron orbitals
  4. Skeleton and Shovel
  5. Microprocessor chips
  6. Saturn V rocket engine, US Space and Rocket Center, Huntsville, Alabama
  7. Microscopic view of rotavirus
  8. Study of the Human Figure, Anterior View
  9. How Seeds Travel
  10. Colored engraving of Newton's reflecting telescope
  11. Technicians Wanted to Engineer our Future on Mars
  12. Gas bubbles in oil
  13. Balance
  14. Mouthwash swirling around teeth
  15. Male skeleton, artwork
  16. DNA molecule
  17. Standard lathe
  18. Leukemia blood cells, light micrograph
  19. Living Relatives of Dinoaurs
  20. Veins and nerves of the neck. cardiovascular system, nervous system
  21. Male Hercules Beetle
  22. Utah - USGS State Mosaic
  23. Ammonite
  24. Caduceus and graph
  25. Oregon. Close-up of Graveyard Point Plume Agate stone
  26. Light echoes from exploding star
  27. The Summer Road
  28. Rice Terraces, Longsheng Ping'an, Guangxi
  29. Mars
  30. Wave energy
  31. Early petrol locomotives
  32. Earth Agate A
  33. Organ of Corti, inner ear, SEM
  34. Malachite
  35. Illustration of a whiplash injury to the neck
  36. Healthy brain, MRI scans
  37. Louis Pasteur, French microbiologist
  38. Anterior view of human pelvis, with labels
  39. Child's foot, X-ray
  40. Quartz crystals
  41. Artwork showing the pupil of eye in varying light
  42. Comparison of bones of forearm and lower leg - anterior view. skeletal system
  43. Table of mathematical functions
  44. Assembly Required to Build Our Future on Mars and its Moons
  45. California, Summit City, Shasta Dam, Shasta Lake, with view of Mt. Shasta
  46. Osteoclasts in bone lacunae, SEM
  47. Portrait of Isaac Newton (1642-1727), c.1726
  48. Human skull with teeth, computer artwork