On 24th October 1632 was born Antonie van Leeuwenhoek, Duch bioloist

Antonie van Leeuwenhoek, Duch bioloist, has invented a special microcope and with its help, he discovered bacteria and protozoa, he has studied blood cells and semen. All his observations are gathered in the work "Opera omnia sive Arcana naturae ope exactissimorum microscopiorum detecta"