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Along with his father Hans Janssen, he invented the microscope by sticking a bunch of lenses into tubes, one of which was called a two foot long brass tripod.
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He realized that matter was neither able to be created nor destroyed. He also claimed that gas could be created by burning charcoal.
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Francesco Redi was able to disprove of the theory that maggots would be generated from meats using controlled experiments.
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He built microscopes with lenses which could be seen up to 270 times the diameter, he was also the first to see and describe things like bacteria, and yeast plants.
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He invented the word cell,and the universal joint, and discovered that there were cells that lived in beverage caps, and devised the compound microscope.
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He had reported that snail and earth worms were able to regrow themselves, along with tadpole legs, and adult frogs.
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He was one of the first scientist to recognize the importants of individual cells in the functioning of an organism.
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He tried examining cells in people's stomaches, and studied these cells known as notrichord.
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He believed that whole organisms were not able to get sick, but only a few or a bunch of cells would be able to get sick, and that all disease involves changes in normal cells, which he called cellular pathology.
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He proved that in people's clothing, dangerous microbes were attacking soft and healthy ones. He also tried exposing diseases to animals to cure rabies.
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He belive that cells could erupt from the nuclear surface like blisters, and that cell nucleus could be connected with the division of cells. Another thing he did was invent plant cytology.
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He build the electron microscope in which two of the most important images of reproduction were put in use.
