Hans & Zacharias Janssen produced the first compound microscope.
Robert Hooke was the first person to call the spaces in cork cells.
Anton van Leeuwenhoek observed living cells through a microscope.
Matthias Schleiden discovered plant are made of cells.
Theodor Schwann discovered animals are made of cells.
Carl Braun restates the second part of the cell theory proposing that cells are the basic unit of life.
Rudolph Virchow adds a third part of the cells theory and state that cells only come from other living cells.
German scientists Ernst Abbe made a compound microscope with complex lenses.
German physicist Ernst Ruska created the first electronic micrscope.
An SEM sends electrons over the surface of a specimen rather than through it.