Learn about the different types of microscopes, and how they can help scientific investigation.

Dive into a single drop of pond water to discover the microscopic world of freshwater organisms. Learn about protists, bacteria, and other tiny inhabitants that can only be seen under a microscope.

In this advanced simulation, students experiment with changing the ion ratios in solutions and thus the pH. The experiment can be viewed on a macroscopic or microscopic level, or customized.

Follow this interactive to identify the differences between bacteria and viruses. Look through the lens of a microscope to observe how each functions and impacts humans.

Discover the world of bacteria from their importance in the development of more complex life forms to how they use flagella to move. Highlights the characteristics of cyanobacteria.

Evaluate the effectiveness of snails as a biological control to combat the spread of an alien alga in the Mediterranean. Grow and culture algal "mats" on microscope slides to observe the grazing behavior of pond snails.

Explore the study of all things very, very tiny. Where is nanotechnology used? How is it measured? Find out!

This site has some history of van Leeuwenhoek (1632-1723 CE) with a description of his major accomplishments in the field of microbiology

This site is provided for by Zephyrus. So, who was Anton van Leeuwenhoek (1632 -1723 CE)? What else did Leeuwenhoek do? Did he achieve anything else? What honors were awarded to him? These questions are answered in this informative site.