Documentary reporting on an ambitious plan to reintroduce wild wolves into America's Yellowstone National Park. The animals were virtually hunted out of existence 100 years ago and this film follows one pack as they attempt to re-establish themselves in the famous mountain wilderness

Predators with the largest fangs of any snake and venom containing up to 50 deadly ingredients, vipers kill more people than any other animal. But now that medical science is beginning to discover the healing power of natural poisons, could this lethal reptile turn out to be a boon for mankind?