PLANET EARTH Ice Worlds

The next day a sea fog shrouds the island. The walruses sense that they're in danger. Using the fog as cover the bear approaches the herd. The adults close ranks around their young, presenting a wall of blubber and hide. He tests the barrier but it stands firm. It appears that the world's largest land carnivore has met his match. There must be a chink in the armor somewhere. Not here.



This female walrus is shielding her pup（幼崽）, it can just prise her off. The bears claws and teeth can't penetrate her thick hide. With the herd retreating to water the bear must move quickly. Having failed with one he heads straight for another. The chance of his first meal in months is slipping away. He seems increasingly desperate.



It's now or never（机不可失，时不再来）. He must avoid the stabbing tusks if he's to win. The flailing walrus is immensely powerful and drags the bear away from the shallows towards the safety of the herd. It slips from his grasp. Only at the height of summer when bears are on the verge（边缘） of starvation will they risk attacking such dangerous prey. It was a gamble（赌博，冒险） that this bear took, and lost.