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  1. Indigo Agate D
  2. Scientist working in laboratory
  3. Purple Watercolor Agate I
  4. X-ray view of human foot
  5. The human skeleton and muscular system, front view
  6. Bright Periodic Table - Black, Modern Text
  7. Tentative phylogenetic scheme for hominid species
  8. Evolution of life, artwork
  9. Female muscles, artwork
  10. Molecular graphic of a molecule of water
  11. Heart and lungs, historical illustration
  12. Three stages of periodontal disease
  13. Blood clot, SEM
  14. Human teeth structure with labels
  15. Florida - USGS State Mosaic
  16. Partial solar eclipse, January 2011
  17. Conceptual image of synapse of neuron inside brain
  18. Brain anatomy
  19. Daimler automobile, 19th century
  20. Human blood cells, SEM
  21. Circuits
  22. Moss Agate
  23. Anatomy of human body and circulatory system, front view
  24. Elastic artery cross-section, SEM
  25. The Moon
  26. Brass astrolabe from the middle ages
  27. Algerian Sahara - USGS Earth as Art
  28. Physician and Patient
  29. Wood. Scanning electron microscope (SEM)
  30. Dione and ring shadows on Saturn, Cassini
  31. The cervical vertebrae
  32. E=mc2 in blue
  33. Metal hydroxides
  34. The vertebral column
  35. Earth's magnetic field protection
  36. Blood spectra, 19th century artwork
  37. DNA
  38. Root canal therapy
  39. Medical chart showing the signs and symptoms of sciatica
  40. Lung anatomy, artwork
  41. CT scan of brain
  42. Vintage Parchment Ophthalmoscope Patent
  43. Faded Blueprint Stethoscope Patent Poster
  44. Synapses, artwork
  45. Human nervous system, artwork
  46. Human tooth anatomy, diagram
  47. Foot bones
  48. Abstract line pattern.