how Antony van Leeuwenhoek discovered an invisible world
"For fans of the 'Who Was' series, this lively, accessible, and full-color chapter book biography shows how a self-taught scientist was the first to observe the microbial life in and around us. By building his own microscope, Antony van Leeuwenhoek advanced humanity's understanding of our oft-invisible world around us"--Provided by the publisher.