This video segment adapted from NASA uses animation to illustrate the properties of meteor showers and comets. Included is are visualizations of a comet's tail and of Earth passing through a debris stream left behind by meteoroids.

Amazing Science provides teachers with facts about comets that they can use as a reference or to stimulate class discussion. The science questions support the instructional activity's activities.

Provides a general overview of comets, asteroids, and meteorites. Content includes ways to identify them in the night sky, as well as detailed information on each type of small body.

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.