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

Researchers are beginning to find data implicating that an asteroid impact and supervolcanoes might have been the beginning of the end of dinosaurs on Earth.

This site provides wonderful lesson plans about dinosaurs. Seven sequenced units cover the following topics: extinction, fossils, types of dinosaurs, and the dinosaur life cycle. The site provides basic lesson and background information...

There is plenty of information about dinosaurs here for students doing research. There are a fair number of ads but they are mainly related to dinosaurs. Besides fact pages for hundreds of dinosaurs, you will find information about...

Answers to a series of nine questions related to dinosaurs. There are a number of links to other informative sites as well.

Borths, D'Emic, and Pritchard give a quick history of mass extinctions. [5:01]

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

In this video segment adapted from NOVA, animations of an asteroid hitting Earth are used to illustrate this widely accepted theory of dinosaur extinction and the resulting conditions that favored mammals.

From ABC News in Science, this article explores the validity behind current findings and research on the dinosaur to bird theory. The research is conducted on the Sinosauropteryx, which is a turkey-sized dinosaur with "proto-feathers."

This site from the UCMP Berkeley provides information about the Cretaceous Period, the last portion of the age of the dinosaurs and the continued break up of the continent of Pangaea.

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.

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.