http://media.libsyn.com/media/pointofinquiry/8-18-06.mp3 Neil deGrasse Tyson - The Sky Is Not the Limit http://pointofinquiry.libsyn.com/index.php?post_id=121450# 2006-08-17 http://libsyn.com/podcasts/pointofinquiry/images/pointofinquiry.jpg