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1665, Robert Hooke
Robert Hooke took a look at a of cork underneath a microscope and noticed that, up close, it looked like it was made of empty “cells” like the ones monks slept in at monasteries (or prisoners in jail) -
1595, Hans and Zacharias Jenssen
Brothers Hans and Zacharias Jenssen developed the first compound microscope. -
1838, Matthias Schleiden
Schleiden, a botanist, studied hundreds of plants under his microscope and, in 1838, realized that each and every one was made of the cells. -
1855, Rudolf Virchow
In 1855, Rudolf Virchow published a book stating his belief that all cells are made from other living cells. -
1839, Theodor Schwann
In 1839, Theodor Schwann realized that the nucleus of Schleiden’s plant cells was very similar to what he noticed in animal cells under his microscope.
