The history of microscopes

1590 CE Janssen created the first microscope

1665 CE Hooke discovered cells

c. 1670 CE Leeuwenhoek discovered microorganisms

1883 CE Brown discovered that plant cells had smaller structures

1838 CE Schleiden proposed that all plants start off as a cell

1839 CE Schwann proposed that animals are also made out of cells

1842 CE Nageli observed diving cells to make new cells