NOVA: Wild Ways

Four-lane highways may be a necessity to modern society, but they can be death traps for millions of animals that try to cross them. Some of the world’s most beloved species – lions, bears, antelope and elephants – can be preserved by linking the world’s wildlife refuges with tunnels, overpasses and protected land corridors. From North America’s Yellowstone to Yukon initiative to southern Africa’s elephant highways stretching across five nations, see how animals are on the move again.

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