BBC on-line has a story about the Peter Sheehan Geology paper: http://news.bbc.co.uk/hi/english/sci/tech/newsid_863000/863320.stm By the way, Peter Sheehan was on the dinosaur list in 1995 or so, and his posts in the March/April 1995 archives address the gradual decline vs. sudden extinction research at Hell Creek. Mary mkirkaldy@aol.com