a href="http://www.glennsacks.com/why_dads_matter.htm"Why Dads Matter/a.br /br /Update: The commenters in this post as well as previous ones seem to enjoy conversing with our prolific commenter on this blog, Greg Kuperberg. Greg now has his own blog where you can comment directly to him at a href="http://quantumgroup.blogspot.com/"The Quantum Group blog./a