I really like this idea.  Television has been proliferated with ghost hunting shows for a while now,  So this concept is something many are currently aware of, and would find interesting.  Lots of fun stuff to play off of here.  I hope you continue to develop it.  

A universally important question with big ramifications.  I’m particularly interested in how such evidence will affect various individuals and cultures in the story.  Lots of room to play with how different religions respond and the kind of chaos or peace a discovery like this would bring to the world.