The Microscope Timeline By Owenatzz 1590 The first microscope was invented 1663 Robert Hooke discovered cells 1674 Leeuwenhoek discovered living organisms 1838 Schleiden discovered that all plants are made of cells 1839 Schwann discovered that all animals are made of cell 1855 Virchow discovered cells come from other cells 1930 The electron microscope was invented