I have a bizarre fascination with algae. There is a lot of science going on with algae for use in food stuffs, in detoxifying industrial waste, and even as food. But my geek-itude is vastly exceeded by Jared Bouck, whose created an entire site about the cultivation of algae. I’m bookmarking this for later fun.

AlgaeGeek.com – Site News

Addendum: While reading the algae page on Wikipedia, I found a link to this book on identifying freshwater algae in the United States.

An annotated key to the identification of commonly occurring and dominant genera of algae observed in the phytoplankton of the United States