Montana

Science, Tech & Environment

A way to save one of North America's fastest animals

For centuries, herds of pronghorn have traveled hundreds of miles across the west in the second longest land migration in North America. But today, pronghorn often encounter barbed wire fences on private and public land that delay or halt their journey. Now, scientists and wildlife managers are developing fencing systems that allow the pronghorn to cross safely.

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.

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.