CK-12 Foundation
Ck 12: Earth Science: Extinction and Radiation of Life
[Free Registration/Login may be required to access all resource tools.] Describes how species die out, and how new ones evolve to fill the vacant niches.
CK-12 Foundation
Ck 12: Biology: Mesozoic Era the Age of Dinosaurs
[Free Registration/Login may be required to access all resource tools.] Covers the Mesozoic Era, the age of dinosaurs.
CK-12 Foundation
Ck 12: Biology: Human Actions and the Sixth Mass Extinction
[Free Registration/Login may be required to access all resource tools.] Describes how human actions are resulting in a sixth mass extinction.
PBS
Pbs: A Modern Mass Extinction
Are we in the midst of a mass extinction? Is Homo sapiens triggering this mass extinction? Four expert panelists have written responses to the aforementioned questions for this highly informative site.
Science Struck
Science Struck: Major and Lesser Extinction Events in Earth's History
Read about some of the extinction events that have occurred during the history of the Earth.
CK-12 Foundation
Ck 12: Biology: Human Actions and the Sixth Mass Extinction
[Free Registration/Login may be required to access all resource tools.] Describes how human actions are resulting in a sixth mass extinction.
CK-12 Foundation
Ck 12: Biology: Biodiversity Crisis Study Guide
This comprehensive study guide covers the main terms and concepts needed for a unit on the biodiversity crisis.
CK-12 Foundation
Ck 12: Earth Science: Extinction and Radiation of Life Study Guide
Use this study guide to understand extinction and radiation of life.
PBS
Pbs Learning Media: Fossils in the Gobi
Biologist Mike Novacek discusses his discovery of mammal fossils in the Gobi Desert and tells us what we can learn from them. From an episode about extinction broadcast on the PBS series "Evolution."
Other
Catastrophism and Mass Extinctions
An overview of Walter and Luis Alverez's theory that a large meteorite crashed into earth causing huge tidal waves, showers of ash, and an enormous dust cloud.
Other
Who Dunnit to the Dinosaurs?
"One of the great mysteries in science is the extinction of the dinosaurs at the end of the Mesozoic Era some 65 million years ago. Who (or more likely what) caused it is unknown and a subject of great debate." Many theories are touched...
Morning Earth
Morning Earth: Biosphere Community: Six Great Extinctions
Students examine the topic of evolution and extinction. Includes definitions, examples, and pictures on six extinctions events.