What did van leeuwenhoek do?

Answer 1

Leeuwenhoek was the first person to see bacteria. He also observed organisms in water and was the first to see them. He used his own microscope that he made himself.

Answer 2

Antonie van Leeuwenhoek was a Dutch scientist who is known for his improvement and use of the microscope to observe microorganisms, which laid the foundation for the field of microbiology. He is credited with discovering bacteria, protists, and sperm cells, greatly advancing our understanding of the unseen world.