The Dutch naturalist and microscopist Anton van Leeuwenhoek (1632-1723), using simple microscopes of his own making, discovered bacteria, protozoa, spermatozoa, rotifers, Hydra and Volvox, and also parthenogenesis in aphids. Anton van Leeuwenhoek was...

Antoni van Leeuwenhoek is best remembered as the first person to study bacteria and "animalcules," or one-celled organisms now known as protozoa. Unlike his contemporaries Robert Hooke and Marcello Malpighi, Leeuwenhoek did not use the more advanced...

Antoni van Leeuwenhoek is best remembered as the first person to study bacteria and "animalcules," or one-celled animals, now known as protozoa. Unlike his contemporaries Robert Hooke and Marcello Malpighi, Leeuwenhoek did not use the more advanced...

1632-1723 Dutch Microscopist and Scientist Known as the father of microbiology, Anton van Leeuwenhoek was a Dutch scientist who was the first to use a microscope to observe bacteria and protozoa (one-celled animals). His researches on lower animals...

1632-1723 Dutch microscopist and biologist who was among the first to study biological specimens with a microscope. He is regarded as one of the founders of modern biology. He was first to observe bacteria and protozoa; co-discovered spermatozoa;...

LONDON, November 1677--A Dutch merchant's startling claim that thousands of tiny monsters frolic within a single droplet of water was verified at the Nov. 15 meeting of the Royal Society of London. Society Fellow Robert Hooke, who made the decisive confirmation, de...

Wretched beasties moving about very nimbly," was what Anton van Leeuwenhoek (LAY-vuhn-hohk) said about the things he was looking at through a microscope. Later he called these "beasties" animalcules, or little animals. He saw different animalcules when he looked at drops of rainwater,...