Extinction Mystery Discovered - Extraterrestrial Cause??

Paul H bristolia at yahoo.com
Wed Mar 9 17:16:36 EST 2005

Mystery Undersea Extinction Cycle Discovered
John Roach, National Geographic News, March 9, 2005
http://news.nationalgeographic.com/news/2005/03/0309_050309_extinctions.html

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Rohde, R. A., and Muller, R. A., 2005, Cycles in
fossil
diversity. Nature. vol. 434, no. 7030, pp. 208-210.

doi:10.1038/nature03339
http://www.nature.com/cgi-taf/DynaPage.taf?file=/nature/journal/v434/n7030/abs/nature03339_fs.html

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Kirchner, J. W., and Weil, A., 2005, Biodiversity:
Fossils make waves. Nature. vol. 434, no. 7030, pp.
147-148.