- The Late Devonian Mass Extinction - http://www.lpi.usra.edu/meetings/impact2000/pdf/3072.pdf
A professional technical paper discussing whether the Late Devonian (Frasnian-Famennian) mass extinction was initiated by an extraterrestrial impact or an earth-bound event.
- Mass Extinction - http://www.lassp.cornell.edu/newmme/science/extinction.html
A mathematical model for mass extinction.
- Extinction - http://www.peripatus.gen.nz/paleontology/extinction.html
A number of extinction concepts are discussed and loosely defined, followed by a survey of some important extinction and "extinction-like" events, primarily from the Phanerozoic.
- Phanerozoic Extinctions - http://member.biodiversity.org.uk/teddy/projecta/
Fully referenced BSc honours project on the History of Mass Extinctions with special reference to the proposed sixth extinction taking place at the present time.
- BBC Extinction Files - http://www.bbc.co.uk/education/darwin/exfiles/massintro.htm
Broad, non-technical coverage of the whole field; a good introductory work. Includes mass extinctions, theories, the fossil record, FAQs, and a glossary.
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