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this was when the microscope was invented  by Hans and Zacharias Jansen. Due to poor lens quality, the microscope used only two lenses that could only magnify an object up to 20 or 30 times its normal size. Hence it was hard to observe much tinier details of a cell

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microscopes generally grew lighter in weight which made them more convenient to use and there were achromatic lenses for viewers to see the colours of the cells. There were also new ways to illuminate specimens and control light, and the bases of compound microscopes became more stable.

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1931, the electron microscope was invented. An electron microscope depends on electrons rather than light to view an object. Electron microscopes make it possible to view objects as small as the diameter of an atom!

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Two Dutch eyeglass makers experimented with multiple lenses placed in a tube. and they observed that objects viewed in front of the tube appeared greatly enlarged, creating both the telescope and the forerunner of the compound microscope.

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microscopes today are so advanced that they can magnify a sample as many as 1000 times!!! The microscope can also let viewers see a high resolution of cells with many detail and as well as distinctive colours. There are also many other types of advanced microscopes that can well accommodate to the needs for scientist to do essential research more accurately

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Robert Hooke was the first to discovered cells. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name.

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In 1855, these scientists found key differences between the two cell types. They had the idea that cells were the simplest units of both plants and animals. A scientist named Rudolf Virchow made an important discovery in 1855. He found that all new cells are made by existing cells

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Robert Grosseteste writes on optics, and the production of lenses, while asserting models should be developed from observations, and predictions of those models verified through observation, in a precursor to the scientific methods.

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Robert Hooke first discovered plant cells

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More details and colours of cells can be seen with the microscopes we use now !

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Anton van Leeuwenhoek was the first person to see protozoa, using microscopes he constructed with simple lenses.

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the nucleus — discovered by Brown in 1831 — was a relatively familiar structure, as was the nucleuolus, named by Schleiden.