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  1. NASA, Houston, Texas
  2. Phrenology chart
  3. Evolution of man
  4. Diagram of spinal cord, vertebrae, and sympathetic trunk. nervous system
  5. Syringe and phials
  6. Scanning electron micrograph of Staphylococcus and a dead human neutrophil
  7. The vertebral column
  8. Layers Of The Ionosphere
  9. Long Island Railroad Communication Lines
  10. Drugs
  11. Satellite view of city lights in several European and Nordic cities
  12. Sex-linked inheritance of white eyes in Drosophila flies
  13. Laboratory Equipments
  14. Sickle cell anaemia
  15. 1874 Charles Darwin picture by Leonard
  16. Conceptual image of DNA
  17. Colorized image of HIV-infected H9 T-cell
  18. Patent--Sewing Machine
  19. Mathian steam boiler
  20. Osteoblasts building healthy bone
  21. Abstract line pattern.
  22. Early electric lamps
  23. Cardiac muscle, SEM
  24. Comparing Saurischian and Ornithischian Pelvises
  25. Pt. Reyes
  26. Modern Geode IV
  27. Celsius Wind Chill Chart
  28. Protozoa, historical artwork
  29. Valley And Mountain Breezes
  30. Keyboard Keys
  31. Map of global heat
  32. Artwork of tooth showing periodontal disease
  33. Torso bones
  34. Tuberculosis, Don't Kiss Me!: Your Kiss of Affection, the Germ of Infection - WPA Poster
  35. Earth Interior - Crust, Mantle, and Core
  36. Caribbean Luxury - USGS Earth as Art
  37. Thomas Edison, US inventor
  38. Electrocardiogram of human heartbeat, close-up
  39. Mixing Potions
  40. Total solar eclipse, 1878
  41. Connections being made to microchip
  42. Bright Periodic Table - Black, Modern Text
  43. Brain and spinal cord, 1844 artwork
  44. Anticoagulant molecule
  45. Technicians Wanted to Engineer our Future on Mars
  46. The Plough asterism in Ursa Major
  47. Iron pyrites
  48. Arthritis of the hip, X-ray