The History of the Cell Theory

  • Oct 10, 1243

    Roger Bacon

    Roger Bacon (1214 - 1294) used a convex lens as a magnifying glass
  • Period: Apr 6, 1300 to

    The Cell Theory

  • Robert Hooke

    Robert Hooke (1635 - 1703) further developed the compound microscope. He first described cells, as lots of little boxes.
  • Anton van Leeuwenhoek

    Described unicellular organisms as 'animacules', from a drop of stagnant rain water. He discovered bacteria from his observations of saliva.
  • Robert Brown

    Discovered nucleus
  • Mathias Schleiden & Theodor Schwann

    They proposed the theory that all living matter is composed of small units called cells
  • Rudolf Virchow

    He proposed that all cells arise from cells as animals come only form animals and plants only from plants
  • Walter Flemming

    Described cell division (mitosis)
  • Ernst Ruska

    Built the first electron microscope
  • Paul Kirkpatrick and Albert Baez

    Built the first x-ray microscope
  • The First Synchrotron!!

    The first synchrotron became operational in the USA
  • James Watson & Francis Crick

    The X-ray diffraction image reveled a crystalline image of DNA which enabled Watson and Crick to reveal the structure of DNA
  • Winfried Denk

    Two-photon fluorescence microscope