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  1. The increase in hominid cranial capacity over time
  2. Standard electrical circuit symbols
  3. Scoliosis of the spine, artwork
  4. Printed circuit board
  5. Christmas Jasper
  6. Gold Leaf Agate
  7. Jurassic landscape, artwork
  8. Computer hard disc
  9. Time-lapse image of a solar eclipse
  10. Volcanoes - USGS Earth as Art
  11. Pietersite
  12. Human spine, artwork
  13. Liver proteins
  14. Bouncing ball
  15. The musculoskeleton of the jaw
  16. Signal Hill Oil Derricks
  17. Turquoise gemstone
  18. Water mill and pump, 18th century
  19. Uranus and its rings, artwork
  20. Magic Money
  21. Cutting out the Stone of Madness or an Operation on the Head
  22. Earth Agate E
  23. Triceratops
  24. Practical Television, February 1958
  25. Tuberculosis bacteria
  26. Coronary artery disease
  27. Acetylcholine crystals, light micrograph
  28. 19th Century internal combustion engine
  29. Parana River Delta - USGS Earth as Art
  30. Bellis and Morcom steam engine
  31. Chemistry research
  32. Co-enzyme NAD (nicotinamide) crystals
  33. 50 Kilowatt Broadcasting Modulator
  34. Avian flu virus, TEM
  35. Inner ear hair cells, SEM
  36. Calcium phosphate crystal, SEM
  37. Conceptual image of DNA
  38. Cross section of human blood vessel showing atherosclerosis
  39. Retina in glaucoma, artwork
  40. High-pressure steam engine, 19th century
  41. Wilson Dam, Alabama, forms portion of the Tennessee River barge route
  42. Avoid Downloades
  43. Carboniferous insects, artwork
  44. Vintage Parchment Bausch And Lomb Microscope Patent Poster
  45. Table from Becher's 'Opuscula chymica'
  46. Mylius' Philosophia reformata
  47. Microglial White Blood Cell, SEM
  48. Artwork of Crohn's disease of the small intestine