Studying the scratches on very ancient stones!
http://www.osa-opn.org/home/articles/volume_18/issue_7/features/archaeophotonics_lasers_unveil_the_past/#.URO7TRG9KSM
Support:
Communities Against Serious Injury From Wireless Technology
Read about the hidden dangers of WIFI for babies and children.
Scratches to Sketches