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Robert Hooke published a book, "Micrographia", about observations with microscopes. He used the term cell to describe biological organisms.
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In 1668 Redi disproved spontaneous generation by sealing a jar and putting moldy meat inside, and kept a jar open. The jar that was open had maggots inside, the jar that was sealed did not.
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Around 1668 Leeuwenhoek ginded lenses to make his first microscope that could magnify 275 times.
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Leeuwenhoek was the first person to discover living organisms when he looked at cork through a microscope
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John Needham buts boiled broth in a jar lets it cool down and then seals it. A couple days later the broth is contaminated, therefore proving spontaneous generation.
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Robert Brown discovers the nucleus of a plant
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Theodor Schwann isolated an enzyme that was essential to digestion.
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Schleiden publishes a book, "Contributions to Phytogenesis", describing the cells of plants and why they are important.
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John Pastuer discovered that bacteria was in the air and then developed inside food and drinks.