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CK-12 Foundation
Ck 12: Life Science: Mass Extinctions
[Free Registration/Login may be required to access all resource tools.] An organism goes extinct when all of the members of a species die out and no more members remain. Extinctions are part of natural selection. Species often go extinct...
The History Cat
The History Cat: Geography: Environment: Tigers on the Brink
Discusses the threats faced by the Bengal Tiger in India that are bringing it to the brink of extinction. These include loss of habitat, loss of food sources, and poaching.