With the help of his father, Zacharias Janssen was credited for making the first telescope even though he was really young.
Cells will be called "cells" because they remind me of the cellula which monks stay in.
While studying the epidermis of orchids, Robert Brown discovered "an opaque spot" which he later called a nucleus.
Matthias Schleiden proposed the idea that all plant tissues are made of cell and that cells are the basic building blocks for all plants. He discovered that cells were alive.
Theodor Schwann discovered that animals also have cells. He made two of the three parts of the cell theory. 1-Cells are organisms and all organisms consist of one or more cells 2-cells are the basic unit of structure and function for all organisms.
Rudolf Virchow wrote the final part of the cell theory which states that all cells develop from preexisting cells.