In 1677, just twenty years after William Harvey's death, Dutch scientist Antonie van Leeuwenhoek created a microscope powerful enough to magnify the sperm found in semen. Because Harvey could not ...

This story appears in the September 2019 issue of National Geographic magazine. In hopes of seeing why a peppercorn tastes peppery, Antonie van Leeuwenhoek (1632-1723) soaked one in water and put ...

Late 1600s – Dutch scientist Antonie van Leeuwenhoek constructed a microscope with a single spherical lens. It magnified up to ×275. 1800s - the optical quality of lenses increased and the ...

Leeuwenhoek shows the scientist his "microscope". A scientist examines a flea, mold on bread, and other objects through a "microscope." He recommends that Leeuwenhoek write about his invention to ...

On September 17, 1683, Dutch scientist Antonie van Leeuwenhoek wrote to the Royal ... Looking at these samples using a single-lens microscope he had designed himself, he reported, "I then most ...