Cell Theory Timeline

  • Aristotle
    340 BCE

    Aristotle

    theorized how animals and plants developed through preformation and epigenesis. Supported spontaneous generation
  • Zacharias Jansen

    Zacharias Jansen

    Believed to be the first person to invent the compound microscope
  • Jan Baptist van Helmont

    Jan Baptist van Helmont

    Believed in spontaneous generation. Said that if you put a rage over a pot of riced you will create mice in 21 days
  • Robert Hooke

    Robert Hooke

    Looked at a cork under microscope and discovered cells. Supported spontaneous generation
  • Anton van Leeuwenhoek

    Anton van Leeuwenhoek

    Adjusted the original microscope
    Did not support spontaneous generation
  • Lorenz Oken

    Lorenz Oken

    Stated that all cells originate from and consist of cells
    Did not support spontaneous generation
  • Robert Brown

    Robert Brown

    Discovered the nucleus in plant cells. Did not support spontaneous generation
  • Theodore Schwann

    Theodore Schwann

    Contributed to the cell theory by stating that cells were the basic unit of structure in living things. Did not support spontaneous generation.
  • Matthias Schleiden

    Matthias Schleiden

    Applied cell theory to plants. Did not support spontaneous generation
  • Albrecht von Roelliker

    Albrecht von Roelliker

    Discovers sperm and eggs are also cells. Did not support spontaneous generation.
  • Rudolf Virchow

    Rudolf Virchow

    Endorsed cell division and the role it plays. Did not support spontaneous generation
  • Louis Pasteur

    Louis Pasteur

    Learned that microorganisms spoil food