The Forum | 18 July 2019 | 0h 39m | Listen Later 
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Tells the story of Antonie van Leeuwenhoek who was the first to observe bacteria and other microscopic lifeforms that couldn’t be seen by the naked eye. He is now regarded as the father of microbiology and yet he had neither scientific training nor university education, and spent his life first as a linen merchant and then a civil servant in a small Dutch city.