PBS
Pbs Learning Media: Allopatric Speciation
These images from the Smithsonian Institution depict Nancy Knowlton's work with snapping shrimp in Panama. Knowlton found that the closing of the isthmus -- dividing the Pacific Ocean from the Caribbean -- resulted in new species of shrimp.
CK-12 Foundation
Ck 12: Life Science: Origin of Species
[Free Registration/Login may be required to access all resource tools.] The creation of a new species is called speciation. Most new species develop naturally. But humans have also artificially created new breeds and species for...
CK-12 Foundation
Ck 12: Biology: Origin of Species
[Free Registration/Login may be required to access all resource tools.] Discusses how new species evolve.
BiologyWise
Biology Wise: Examples That Explain Geographic Isolation
Discusses how unique species evolve when geographic barriers restrict population interbreeding, such as when organisms are confined to an island. Examples are provided.