Cell Theory Timeline

  • World's first compound microscope

    Zacharias and Hans Jenssen invent the first microscope.
  • Period: to

    Cell Theory

  • Robert Hooke discovers cells

    While looking at a sliver of cork through a microscope, Robert Hooke discovers the cell.
  • Francesco Redi disproves spontaneous generation theory

    Francesco observes rotten meat to see if it turned into flies.
  • Anton Van Leeuwenhoek observed many things...

    Anton looked at many things including blood cells and bacteria, and carefully drew what he saw.
  • John Needham looks at some soup

    Needham discovered that soup that had been exposed to the air contained micro organisms. He theorized that a life force was present in all inorganic matter including air and oxygen that could cause spontaneous generation.
  • C. F. Wolf comes up with a generalized cell theory

    Exactly what it says...
  • Lazzaro Spallanzani variates John Needham's experiment

    Lazzaro Spallanzani, a biologist and abbot in Italy tried several variations on the experiments done by John Needham. He discovered that soup that was kept sealed did not contain the micro organisms that appeared in soup open to the air. He determined that micro organisms get into the soup from the air.