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First Look
Robert Hooke looked at a sliver of cork through a microscope lens and noticed some "pores" or "cells" in it. -
Cell Nucleus
Robert Brown descovers descovers the cell nucleus -
Contributions to Phytogenesis
Matthias Jakob Schleiden stated that different parts of plants are composed of cells. -
Cell Theory
Theodor Schwann and Matthias Jakob Schleiden elucidate the principle that plants and animals are made of cells, concluding that cells are a common unit of structure and development, and thus founding the cell theory. -
Omnis cellula e cellula
Virchow theorised that every cell originates from another existing cell like it.