This Wikipedia article gives a brief description of nanobes, organisms so small that the idea they should be considered as living organisms is contested. The site includes information about claims made about nanobes, discovery, and links to related sites.

Subject: Biology:Microbiology, Astrobiology
Resource Type: Scientific Resources:Overview/Reference Work
Grade Level: General Public, College Upper (15-16), High School (9-12), Middle (6-8), College Lower (13-14)
Topics: Biosphere:Microbiology, Astrobiology