NOVA
Wed, 04/02/2014 - 9:00pm

A growing number of scientists are discovering that removing top predators from the wild has thrown ecosystems off-kilter, triggering domino effects that scientists are just beginning to understand. NOVA follows scientists who are trying out a simple but controversial solution: returning apex predators — like coyotes, bears and panthers — to their natural environments. Can these newly introduced predators restore the natural balance of their ecosystems without threatening the humans who live among them?