Hi, I'm Robert Hooke. I'm an English scientist. I used a primitive compound microscope to discover one of my greatest discoveries. Let me tell you all about how this happened.
I studied at three different colleges. Christ Church Oxford, Wadham College Oxford, and University of Oxford. Which then I became a natural philosopher, architect and polymath.
Along the way I have published books and articles. After discovering microscopes, I published a book called, "Micrigraphia". It was about observations the microscope made while working in biology. So, that's when I thought there could be more to discover.
I was looking at the bark of a cork tree, and observed it's microscopic structure. I was able to look very closely at objects I wouldn't even be able to see with my "naked eye". It was similar to a telescope, but with objects much closer.
This is how I discovered cells, just by looking through a microscope. I decided to name it, "the building block of life". Then, after doing all my research on the cells, I came across plants. I started to observe plants and noticed the cells were in there too. It blew my mine.
Discovering that, I came to thinking. Cells must be in a majority of things. They are small, and tend to have been in most of the objects I decided to observe underneath the microscope. That's how "all living cells are made of cells", came to be one of the cell theories.