http://scienceblogs.com/deltoid/2009/10/why_everything_in_superfreakon.php http://scienceblogs.com/deltoid/2009/10/why_everything_in_su... This is a good look

http://scienceblogs.com/deltoid/2009/10/why_everything_in_superfreakon.php http://scienceblogs.com/deltoid/2009/10/why_everything_in_su... This is a good look at the various rebuttals to basically everything in this chapter of Superfreakonomics.