an interesting theory as to how babies are made...
The world's first microbiologist Antonie van Leeuwenhoek discovered sperm after putting his own semen under the microscope.
Anton started off by examining more family-friendly objects under the microscope, but his colleagues kept urging him to investigate semen.
Before his discovery of sperm (which he called animalcules), there were some questionable theories about how babies were made, including the belief that semen contained really tiny humans that were transferred to women during sex.
