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this is Robert Hooke it's 1665 and microscopes have only just been invented for the first time scientists were able to look at things too small to be seen by the naked eye and Robert Hooke was fascinated by what he saw this piece of cork seems to be made up of tiny compartments like lots of little woman was all fitted together rooms or cells hope became famous for being the first person to use the word cell to describe the room light structures inside his piece of cork he spent many hours carefully drawing their honeycomb pattern in 1833 one of the leading botanists of the time was Scotsman Robert Brown I've been traveled the world and collected hundreds of plants he made startling discovery so many plants all of them so different except except when look at them plus up every plant is made up of cells and inside every cell that is sort of dark dense blonde whichever fun to choose it's always the same can find not one single exception Robert Brown called the blob light structure inside each cell the nucleus about this time scientists were beginning to realize that all living things were made of cells few years later in 1839 two German scientist dr. Schwahn and dr. schleiden came up with theory which was to change the way scientists view the living world dr. Spartan your doctor schlagg that's them the material inside you mean this thinking sometimes single existence all working together no matter how big or small like plant even this fly yeah and the theory they eventually came up with was that cells are the basic building blocks of life which early scientists contributed to the development of the cell theory you