“I observed certain animalcules, within whole bodies I saw so quick a motion as to exceed belief; they were about the size of a large grain of sand, and their bodies being transparent, that the internal motion could plainly be seen. Among other things, I saw in the body of one of these animalcules a bright and round corpuscle, placed near the head, and in which a very wonderful swift motion was to be seen, consisting of an alternate extension and contraction. This particle I concluded to be the heart.”
Quote by Antonie van Leeuwenhoek
Author
Antonie van Leeuwenhoek
Dutch microscopist known as the 'Father of Microscopy'. Born on October 24, 1632, and died on August 26, 1723. He made significant contributions to microbiology by observing microorganisms through his self-made microscopes. more
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