This episode of NATURE takes viewers into the secretive world of the largest and least known member of the weasel family, revealing it to be one of the most efficient and resourceful carnivores on Earth. Wolverines are among the most elusive creatures on the planet. They seek out the toughest terrain – the most rugged, remote and fiercely raw – and they’ve always been scarce to begin with. So they’re hard to find. They weigh only about 30 pounds, but they have a ton of attitude and a reputation to match.