Michael Shermer wrote an article critical of life extension in a recent Scientific American: http://www.sciam.com/print_version.cfm?articleID=0001AF03-A8B1-1F57-905980A84189EEDF Subsequent article in CSICOP touched on skeptical views on life extension and global warming: http://www.csicop.org/doubtandabout/abuses/ Olga