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Anton van Leeuwenhoek. Thonius Philips van Leeuwenhoek, better known as Anton van Leeuwenhoek, (October 24, 1632 - August 30, 1723) was a Dutch tradesman and scientist from Delft, Netherlands. He is known as the Father of Microbiology..
<b>Anton van Leeuwenhoek , a dutch merchant, discovered the single celled organism.</b><b>He was a microscope seller and he decided to take a look at pond scum.</b> <b>He saw that they were small animals.</b><b>He named them <i>animalcules</i> which means small animal.</b> <b>Today we call animalcules single celled organisms.