The system is evidently able to distinguish between vehicles, animals, and humans -- and it can even differentiate between different types of human activity, including walking, running, and digging.

ENGADGET: UA engineers develop 'invisible,' fiber optic border monitoring system

In the long run, though, it seems the train has reduced the pollution formerly caused by cars and trucks and reduced the number of animals killed by vehicles driving through the park.

BBC: Eco-scorecard to the world��s great attractions

Apprentices must train for years under master guides and don't just learn to spot and track animals from the comfort and safety of their vehicles.

WSJ: Walk With the Animals

At the apex of his collection is an enormous 6-foot-by-12-foot rug with tight knots and beautiful colors that depicts a menagerie of animals--lions, chickens, deer--along with assorted weaponry and vehicles.

FORBES: Magazine Article

In contrast to neighboring countries, where a big game sighting often provokes a lineup of dozens of vehicles vying for the best view, in Zimbabwe, it's just you and the animals.

WSJ: Walk With the Animals