 | Crater - A program that relates crater size to projectile size.
| Earth Impact Craters - Background, list of craters.
| Earth Impact Database - Crater names, location, size, and age. Background information, images, FAQ.
| Geology 376 - 2001 Field Trip - Travelogue of a geology class field trip to the Barringer meteor crater. Images, crater description, topographic map.
| ICE 2002 - Iturralde Crater Expedition - Multimedia journal of a NASA organized expedition to a probable impact crater in the Bolivian Amazon. Background information, daily journal entries, educational materials, science data.
| Impact craters in Finland - List of craters in Finland, separate list of craters on Earth.
| Impact Craters of the Earth - Overview of crater formation.
| Impact Craters on Earth - Map of crater locations in Canada, crater images, explanation and images of rock altered by impact.
| Lonar Crater - A 2km diameter impact crater in India. Background information, tourism, scientific literature, student guide.
| Meteor Crater - Images and short explanations of geologic features near the rim of the Barringer meteor crater.
| Meteor Crater - Official site for the visitors center at the Barringer meteor crater. Short history, animations, visitor information.
| Reuben Johnson's K/T Expedition -- 2001 - Background info on the Chicxulub impact crater at the K/T (Cretaceous/Tertiary) boundary with photos of the 2001 NASA/Planetary Society expedition to Belize and Mexico to study and gather ejecta samples.
| A 'Smoking Gun' for Dinosaur Extinction - NASA JPL article on the Chicxulub crater. An image from the Shuttle Radar Topography Mission shows an elevation feature of the crater. The article gives background information and interpretation of the image.
| Terrestrial Impact Cratering and Its Environmental Effects - World map of impact sites, details on the Chicxulub site, and details on environmental effects of impacts.
| Terrestrial Impact Craters - Text describing formation of impact craters. Images, glossary.
| Terrestrial Impact Craters - Background information, images, list of craters, references.
| Terrestrial Impact Investigations - Images and descriptions of craters in Africa, research activities of the terrestrial impact cratering research group of the University of the Witwatersrand.
| Three Craters in Israel - Investigates the possibility they have been caused by comet fragments.
| Traces of Catastrophe - Online book. Detailed introduction and overview of impact processes, crater formation, and shock metamorphism.
| What are Impact Craters? - Explanation of crater formation and associated effects in surrounding area.
| Why are impact craters always round? - The answer given in an article from Scientific American.
| Astronomy Picture of the Day - Manicouagan Impact Crater on Earth - Image taken from space shuttle Columbia in 1983. (December 13, 2000)
| Astronomy Picture of the Day - Impact: 65 Million Years Ago - Computer rendering of Chicxulub crater, from gravity and magnetic field data. (February 26, 2000)
| Astronomy Picture of the Day - Barringer Crater on Earth - Aerial photograph. (July 11, 1999)
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