Today, 393 years ago, on 24 October 1632 (Calendar 11 September 1632), the Dutch inventor and scientist Ravenhoek was born. Anthony van Ravenhoek (Dutch: Antonivan Leuwenhoek; 24 October 1632 ¨C 30 August 1723), wholly named Thonius Philipsvan Leuwenhoek, was a Dutch merchant and scientist, with the title of father of microbiology. One of the most famous achievements was the improvement of microscopy and the establishment of microbiology. He first observed and described single-cell organisms by a hand-made microscope, and he would then call these organisms "animalcules". In addition, he was also the earliest recorded observer of muscle fibers, bacteria, germs, and microvascular blood flow scient