Cell Theory Historic Timeline

Main

Hans + Zacharias Jansen

1590

Made the first compound microscope (two convex lenses in a tube)

Robert Hook

1663

Introduced the term 'cell' (by observing cork under a light microscope), improved the microscope, telescope and the barometer

Anton van Leeuwenhoek

1674 - 1683

Produced lenses of higher quality/greater magnification, described unicells (animacules), discovered bacteria

Robert Brown

1801

First described the cell nucleus while observing plant cells, also noticed the movements of pollen grains (Brownian motion)

Matthias Schleiden

1838

Stated that parts of plants are made of cells (not visible to the naked eye)

Theodor Schwann

1839

Stated cells made up parts of animals, published, along with Schleiden, The Cell Theory in a book (cells = basis of the structure of all living things)

Rudolph Virchow

1855

Introduced the idea that cells reproduce by dividing (all living cells only come from other living cells- thus challenging the theory of 'spontaeneous generation')

Walther Flemming

1882

Discovered nuclear material 'chromatin material'

Ernst Ruska

1933

Built first electron microscope