302 years ago today, August 26, 1723 (July 26, 1723, the father of microbiology, Leeuwenhoek, died. Anthony van Leeuwenhoek (Dutch: Antonivan Leeuwenhoek; October 24, 1632-August 26, 1723), whose full name was Thonius Philipsvan Leeuwenhoek. He is a Dutch trader and scientist, known as the father of microbiology. One of the most famous achievements has been the improvement of the establishment of microscopy and microbiology. Using a hand-made microscope, he first observed and described single-celled organisms, which he called "animalcles" at the time. In addition, he was also the first scientist to record and observe blood flow in muscle fibers, bacteria, sperms, and microvessels. During his life, he polished more than 500 lenses and manufactured more than 400 types of microscopes, of which only 9 are still in use today. Comments: At that time, grinding mirrors was very harmful to the lungs. Leeuwenhoek actually lived to 90 years old. It was amazing.