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  1. Thomas Edison, US inventor
  2. Quartz crystals
  3. Pictorial plaque on Pioneer 10 and 11
  4. Balance
  5. Generalized Flower And Arrangement Of Floral Parts At The Flower's Base
  6. Carbon nanotube
  7. Base of human skull, inferior view, with labels
  8. Galileo using a telescope
  9. Spirogyra algae, light micrograph
  10. Normal knee, X-ray
  11. Bacteria infecting a macrophage, SEM
  12. Parana River Delta - USGS Earth as Art
  13. Organic synthesis
  14. Close-up of beakers containing colored liquid
  15. The bones of the pelvis
  16. Marie Curie, Polish-French physicist
  17. Universal indicator scale
  18. Conybeare Plesiosaurus reconstruction
  19. Patent--Hot Air Balloon
  20. Mineralogie III
  21. First Atom Bomb Test Site
  22. Conceptual image of DNA
  23. Archaeopteryx
  24. Chemistry Equations
  25. Cholesterol crystals
  26. E=mc2 in red
  27. Brain meninges
  28. The bones of the head, neck and face
  29. Brain and spinal cord, 1844 artwork
  30. Celsius Wind Chill Chart
  31. Layers Of The Ionosphere
  32. Historical celestial system
  33. Dragon Lake - USGS Earth as Art
  34. Pt. Reyes
  35. Fahrenheit Wind Chill Chart
  36. Legend of Archimedes and the lever
  37. Human Skeleton: Lateral view in Crouching Posture
  38. Microscopic view of human antibodies with red blood cells
  39. Impact - USGS Earth as Art
  40. Puerto Rico - USGS State Mosaic
  41. Comparison of healthy gums versus gingivitis
  42. Human brain anatomy, lateral view
  43. Brain anatomy
  44. Scanning electron microscope
  45. Graduated Cylinders And Flasks
  46. Work the Night Shift on Martian Moon Phobos
  47. Atom, artwork
  48. Desert Patterns - USGS Earth as Art