Conflict & Justice

Strands of Evidence: Hair Forensics

What you eat ends up in your hair. Scientists in the US and Europe have used this basic idea to devise a sort of hair-based GPS tracking system. Law enforcement agencies are now using this technique to solve crimes. NOVA's Ari Daniel Shapiro reports.

Where the Antelope Played

The natural gas boom in the Rockies rolls on unabated, changing lands along the way. A swath of western Wyoming is among the latest landscapes converted.