Robert Hooke - discovered the cells by looking at thin cork under a microscope and when he saw the cork, the cork showed regular patterns of tiny own spaces and reminded him as a tiny rooms called Cells.
- such a great contribution of discovering organisms are made up of building blocks called cells.

Albert Einstein - known for his famous theory of relativity and other fields. also considered his a great scientist of all time.

Democritus - a Greek philosopher proposed that all matter is made up of tiny indivisible particles and he called it atomos.