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in 15895, Hans an Zacharias Janssen, father and son, created the first compound microscope by combining 2 convex lenses within a tube. This led to opportunities for others to study cells more.
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In 1665, Robert Hooke discovered and discussed the cellular composition of cork, and durig the process introduced the word ¨cell¨ to the world.
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Anton van Leewuenhoek improved the magnification of microscopes by polishing lensses. This led to being able to study cells and other animacules more closely.
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Anton van Leeuwenhoek discovered ¨animacules¨ - microscopic animals or protozoans in 1676. A big step in studying biology.
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Anton van Leeuwenhoek also discovered bacteria while studying a sample of saliva from his mouth in 1683.
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Robert Brown, a botanist, discovered and explained the cell nucleus in 1833 while studying plants.
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In 1838 Matthias Scheiden discovered that plants are made up of cells.
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Theodore Schwann discovered animals were made of cells after the doscovery that platns were made of cells.
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Carl Heinrich Braun identified cells as the basic unit of life.
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RUdolph Vichrow stated that ¨all cells arise from another cell¨ which is so important becayse it is one of the main concepts of cell theory in 1855
