Students examine the topic of evolution and extinction. Includes definitions, examples, and pictures on six extinctions events.

Provides a detailed discussion of the Paleozoic Era and a timeline of its periods and epochs. Looks at geological and tectonic events, climate changes, flora and fauna, and a mass extinction event.

Overview of the Earth in the Cretaceous Period told by photos, news, and external links with an emphasis on what grew and lived then, the causes of mass extinction, types of fossils, and what life was like in general.

Overview of the Earth in the Pleistocene Epoch told by photos, news, and external links with an emphasis on what grew then, what lived then, the causes of mass extinction, types of fossils, and what life was like in general.

In this interactive tutorial you will explore how geologists use clues in rocks to determine the order in which rocks formed. Learn how principles of radioactivity are used to assign actual ages to rocks. Students will explore fossils...

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."

This article, reprinted from the fall 1979 LBL News Magazine, was written about Dr. Luis Alvarez and his part in the study of geological sediments and the great extinctions.

This UC Berkeley site extensively covers the death of the dinosaurs. It includes history, theories, invalid hypotheses, and current arguments.

Overview of the Earth in the Cambrian Period told by photos, news, and external links with an emphasis on what grew and lived then, the causes of mass extinction, types of fossils, and what life was like in general.

Overview of the Earth in the Devonian Period told by photos, news, and external links with an emphasis on what grew and lived then, the causes of mass extinction, types of fossils, and what life was like in general.

Explore life on ancient Earth with this site! Students can walk with dinosaurs to see what Earth looked like or investigate Earth's history. The site includes articles, pictures, timelines, and lots more.

Examine evidence of a deep-sea core that provides evidence of an asteroid impact sixty-five million years ago, which may have contributed to the extinction of the dinosaurs.

This web page is part of a larger site that focuses on endangered animals and conservation efforts. This page has several topics that are all relevant like the endangered species act, mass extinction, and the bald eagle.

Provides an overview of the Mesozoic Era, its time frame, geological and tectonic activities, the climate, plants and animals, and extinction events towards the end of this era.

"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...

This resource provides basic information of the changes that took place during the Permian period as well as the animals that populated the Earth during this time.

This is an extensive learning module on biodiversity and its decline. It looks at ways biodiversity is threatened, the possibility of another mass extinction, the causes and consequences of habitat loss, factors that drive biodiversity...

[Free Registration/Login may be required to access all resource tools.] Covers the Mesozoic Era, the age of dinosaurs.

A brief overview of viruses from the University of California. Discusses the difference between the lysogenic phase and the lytic phase, gives examples of viral diseases, and provides information on the relationship between viruses and...

Learn more about the life of the scientist that proposed the theory of mass extinction of the dinosaurs due to an asteroid or comet in this article. Read all about the life and scientific discoveries of Luis Alvarez.

[Free Registration/Login may be required to access all resource tools.] Explore the three periods of the Mesozoic Era, the age when dinosaurs roamed the earth. Find out what happened to the dinosaurs.

The San Diego Natural History Museum provides dinosaur lovers with plenty of information and fun facts with links to Finding Fossils and Dinosaur Bytes.

College-level biology book covers the Late Paleozoic geologic time period in Earth's history. See photographs of fossil evidence from that era in addition to diagrams to help with understanding.

This comprehensive study guide covers the main terms and concepts needed for a unit on the biodiversity crisis.