The 17th-century cloth merchant who discovered the vast realm of tiny microbes – an appreciation of Antonie van Leeuwenhoek
- Written by Richard Gunderman, Chancellor's Professor of Medicine, Liberal Arts, and Philanthropy, Indiana University

Imagine trying to cope with a pandemic like COVID-19 in a world where microscopic life was unknown. Prior to the 17th century, people were limited by what they could see with their own two eyes. But then a Dutch cloth merchant changed...