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.


Pipeline Troubles

Anchor Aaron Schachter talks with The World's environment editor Peter Thomson about an oil spill that may have big consequences for a plan to pump oil from Alberta to the Pacific Ocean, and play into the fight over the Keystone oil pipeline in the US.