Subject: Biology:Ecology:Habitats:Within Rock, Biology:Astrobiology, Microbiology Resource Type: Scientific Resources:Overview/Reference Work Grade Level: High School (9-12), College Lower (13-14), College Upper (15-16), Graduate/Professional, General Public Extreme Environments: Extremely Hot, Anoxic Theme: Teach the Earth:Course Topics:EcologyKeywords: endolith, extremophile