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Known as the "laser ablation" method, this new tool can detect what a person eats, or changes in their diet. It can also detect their travels between different countries. And all with the study of a single strand of hair. The tool works by picking up variations in sulfur concentration on the hair.

While there are some techniques out there with some similar capabilities, this new tool is the only one which uses a laser to pick up the exact proportions of the sulfur isotopes. The laser allows for a much higher resolution.

This method was developed by researchers from LGC Chemical Metrology Lab and University of Oviedo in Britain and Spain. Who claim this technique will be helpful for investigators who are tracking terrorists. But it could also be helpful to detectives everyday work. Determining where an unidentified body came from... Or determining if a suspects claimed whereabouts are true...

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