Cell Theory Timeline By Aislinn4537 1590 First microscope invented 1665 Robert Hooke uses a cork to see first cells 1675 Antonie Van Leeuwenhoek discovers first microscopic life using pond water 1831 Robert Brown discovered the nucleus of cells 1838 Matthias Schleiden discovered cells are the basic unit that makes up plants 1839 Theodor Schwann discovered animals are made up of cells meaning all life is made up of cells 1855 Rudolf Virchow established that all cells come from preexisting cells 1869 Friedrich Miescher discovered DNA
