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Inventions and Discoveries

Click on each clue for its answer.

  1. Classification of plants and animals by genera and species (1737-1753)

    Carolus Linnaeus

  2. Digital calculator (1642)

    Blaise Pascal

  3. Stethoscope (1819)

    René Laënnec

  4. Hand-held camera (1888)

    George Eastman

  5. Hot-air balloon (1783)

    Joseph and Jacques Montgolfier

  6. Transistor (1947)

    John Bardeen, Walter H. Brattain, William B. Shockley

  7. Structure of DNA (1953)

    Rosalind Elsie Franklin, F. H. Crick, James D. Watson

  8. Phonograph (1877)

    Edison

  9. Nuclear fission (1938)

    Otto Hahn

  10. Fermentation (c.1860)

    Louis Pasteur

  11. Single rotor helicopter (1939)

    Igor Sikorsky

  12. Vaccination (1796)

    Edward Jenner

  13. Electromagnet (1823)

    William Sturgeon

  14. Proposal of ice age (1840)

    Louis Agassiz

  15. Machine gun (1862)

    Richard Gatling

  16. Dynamo or Electric generator (1832)

    Michael Faraday

  17. Bifocal lens (c.1760)

    Benjamin Franklin

  18. Air conditioning (1911)

    Willis Carrier

  19. Radio waves (1932)

    Karl Jansky

  20. Electron (1897)

    J. J. Thompson

  21. Revolver (1835)

    Samuel Colt

  22. World Wide Web (1989)

    Tim Berners-Lee

  23. First automobile with practical high-speed internal combustion engine (1885)

    Gottlieb Daimler

  24. Pressure cooker (1679)

    Denis Papin

  25. Quantum theory (1900)

    Max Planck

  26. First automobile with internal combustion engine (1885)

    Karl Benz

  27. Analytical engine design, included concepts of programming (1835)

    Charles Babbage

  28. Double rotor helicopter (1936)

    Henrich Focke

  29. Laws of Planetary motion (1609)

    Johannes Kepler

  30. Barometer (1643)

    Evangelista Torricelli

  31. Bacteria (1683)

    Anton van Leeuwenhoek

  32. Electromagnetic theory of light (1873)

    James Maxwell

  33. Reinforced concrete (1877)

    Joseph Monier

  34. Telephone (1876)

    Alexander Graham Bell

  35. Conditioned reflex (c.1910)

    Ivan Pavlov

  36. Polaroid camera (1948)

    Edwin Land

  37. Telescope (1608)

    Hans Lippershey

  38. Cyclotron (1931)

    Ernest O. Lawrence

  39. Portland cement (1824)

    Joseph Aspdin

  40. Intelligence testing (1905)

    Alfred Binet

  41. Cholera bacterium (1883)

    Robert Koch

  42. Telegraph (1837)

    Samuel Morse

  43. Dynamite (1867)

    Alfred Nobel

  44. Condensed milk (1853)

    Gail Borden

  45. Nuclear model of atom (1911)

    Ernest Rutherford

  46. Gyroscope (1852)

    Léon Foucault

  47. Vitamin Deficiency (1912)

    Sir F. G. Hopkins, Casimir Funk

  48. Pendulum clock (1656)

    Christian Huygens

  49. First demonstration of antibiotic effect (1887)

    Louis Pasteur

  50. Electric lamp or arc lamp (1801)

    Humphrey Davy

  51. Concept of Big Bang theory (1927)

    George LeMaitre

  52. Periodic table of elements (1869)

    Dmitri Mendeleev

  53. Organic Evolution (1809)

    Jean-Baptiste Lamarck

  54. Vulcanized rubber (1839)

    Charles Goodyear

  55. Ball-point pen (1944)

    Lazlo Biro

  56. Antiseptic surgery (1867)

    Joseph Lister

  57. Theory of continental drift (1912)

    Alfred Wegener

  58. Rotation of Earth (1851)

    Jean Bernard Foucault

  59. Zipper (1891)

    W.L. Judson

  60. First use of anesthetic on humans (1842)

    Crawford Long

  61. Passenger elevator (1852)

    Elisha Otis

  62. Germ theory (1862-1877)

    Louis Pasteur

  63. Laws of Heredity (1865)

    Gregor Mendel

  64. Blood circulation (1628)

    William Harvey

  65. Modern atomic theory (1808)

    John Dalton

  66. Safety Razor (1901)

    King Gillette

  67. Frozen food (1924)

    Clarence Birdseye

  68. Isolation of Oxygen (1774)

    Joseph Priestley

  69. Radiocarbon dating (1947)

    Willard F. Libby

  70. Coca-Cola (1886)

    John Pimberton

  71. Isolation of insulin (1921)

    Sir Frederick G. Banting and Charles H. Best

  72. Proton (1919)

    Ernest Rutherford

  73. Positron (1932)

    Carl D. Anderson

  74. Discovery of penicillin (1928)

    Alexander Fleming

  75. Cotton gin (1793)

    Eli Whitney

  76. Rocket (1926)

    Robert Goddard

  77. Logarithms (1614)

    John Napier

  78. Neutron (1932)

    James Chadwick

  79. Jet propulsion engine (1936)

    Frank Whittle

  80. Radioactivity of uranium (1896)

    Henri Becquerel

  81. Photovoltaic effect (1839)

    Edmund Becquerel

  82. Rabies immunization (1885)

    Louis Pasteur

  83. X-rays (1895)

    Wilhelm Roentgen

  84. Cell theory (1665)

    Robert Hooke

  85. Nuclear reactor (1942)

    Enrico Fermi

  86. Evolution by Natural Selection (1859)

    Charles Darwin

  87. Polio Vaccine (1952)

    Jonas Salk