“I have divers times examined the same matter (human semen) from a healthy man... not from a sick man... nor spoiled by keeping... for a long time and not liquefied after the lapse of some time... but immediately after ejaculation before six beats of the pulse had intervened; and I have seen so great a number of living animalcules... in it, that sometimes more than a thousand were moving about in an amount of material the size of a grain of sand... I saw this vast number of animalcules not all through the semen, but only in the liquid matter adhering to the thicker part.”
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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