The smallest plants on Earth turn out to be highly sophisticated structures that look fascinating under the microscope.

Cyanobacteria or blue-green algae are undoubtedly the most important microorganisms that have ever appeared on Earth. Here you can read more about these fascinating microorganisms.

Diatoms are brown microalgae that can be found in all freshwater and marine environments. They are an important link in the ecological cycle. In streams and rivers you often see stones covered with a brown layer that is formed by diatoms.