Interest in the Shroud of Turin in most cases is related to news about the Shroud. Here are the stats from Google Trends with identification of the flags and two other points:

Interest in the Shroud of Turin

A. Second face on the back of the shroud discovered (most interest)

B. Rogers’ paper that argues that the carbon dating sample was likely a repair

C. Shadow Shroud story on CBS (most news coverage)

D. Attention from the Winter Olympics in Turin

E. BBC documentary on the Shroud of Turin (little news, much interest)

F. Pope’s announcement that the shroud would be exhibited in 2010 (much news, little interest)

* 3rd Quarter if 2006, unknown story that generated no interest)

* Mid-August 2008, LA Times story about Jackson couple, minor news blip and very little interest.