My name is Anton van leeuwenhoek. I was a dutch shopkeeper. I discovered a single celled organism that i called animalcules (later called protists) using a simple microscope.
My name is Robert Hooke. I was a english scientist. I looked at a cork With a compound microscope. I noticed that in the cork there were small boxes inside of it. I thought it looked like the rooms monks lived in called cells so that's what i called them
A cork And a Cell1675
The technology improves and so does the types of microscopes and so the scientists can look at things even closer.