Penn Jillette is not aging well.
I discovered Penn and Teller (beyond the comedy act) when a friend gave me a dvd of a tv show called Bullsh!t about recycling. I became a huge fan. I’ve watched LOTS of their stuff on Youtube and found, except for our views on Christianity, we are in pretty much complete agreement on every issue the show has ever covered.
BTW, the highly convincing recycling episode has been removed from youtube. You have to go to google video to find it.