Fuller Torrey (and others) suggests the protozoa Toxoplasma gondii is a likely suspect for the pathogen that causes schizophrenia.

FORBES: Move up http://i.forbesimg.com t Move down

There are 200, 000 species of organisms (excluding bacteria and protozoa) in the U.S., and at least 7, 000 of them were introduced artificially.

CNN: Fish tale

With the microscope we became aware of a world of protozoa, airplanes made us creatures that fly, and phones connected our voices around the world.

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Life has been trying to do this since the first protozoa appeared in the primordeal oceans: heck since the first self-replicating chemical compound turned up.

FORBES: The Lancet's Series on Obesity