What is blue-green algae? Is blue-green algae nutritious? This site answers these questions as well as the use of algae in the treatment of diseases.

Discusses the dangers of blue-green toxins on humans.

General information on the cyanobacteria, the blue-green algae and the features that make them different from prokaryotic bacteria. Also included are pages that point to more specific info, like life history and fossil records.

Discusses the characteristics of four different types of algae.

Present evidence suggests that blue-green algae, and possibly other primitive microbial forms of life, were flourishing 3 billion years ago. This brackets the origin of life to within one billion years. Learn more here about...

This illustrated website features facts about lakes and ponds and their special place in geography, natural history, and as a biome.

[Free Registration/Login may be required to access all resource tools.] There is good evidence that life has probably existed on Earth for most of Earth's history. Fossils of blue-green algae found in Australia are the oldest fossils of...

[Free Registration/Login Required] The abcteach directory contains sample pages from their pond unit for non-members. Handouts are in PDF format.

Anusuya Willis explains how cyanobacteria, simple organisms that don't even have nuclei or any other organelles, wrote a pivotal chapter in the story of life on Earth. [4:14]

This site from Suzy's World, which is a personal site from Suzy Cato, explores what evolution is, and how long there has been life on earth. Content includes fun facts, a great experiment, and a classroom activity.