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Title page of an old book Micrographia: or some physiological descriptions of minute bodies by R. Hooke
Cover of Micrographia.

Robert Hooke publishes Micrographia.

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Cover of Micrographia.

This text introduces the use of microscopes for the study of the body, thereby creating the conditions for the later emergence of germ theory. Hooke also coins the term "cell" after looking at cork under the microscope.