Larry Mantle speaks with Dr. Robert Lawrence Kuhn, author of the article Why This Universe: Toward a Taxonomy of Possible Explanations from the most recent issue of Skeptic magazine, about the many possible explanations for the existence of our universe.
The interview is on an episode of AirTalk today (7/31) and was very good. Unfortunately, the site seems to only have it in Real Audio format.
The article is at Skeptic Magazine in a PDF file. There are 85 endnotes on this thing, so you know it has to be good.
As for the magazine itself, I find it sensationalist and just itching to pick a fight. The article is worth reading though.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.