24 年前
视频简介
The Mayan calendar predicts that the world will end in 2012, and many believe it's true. This Emmy-nominated Discovery Channel documentary illustrates the variety of ways the apocalypse could arrive in. True believers will learn how volcanic eruption, widespread plague, deadly asteroids, neighboring stars, and nuclear and biological weapons could each bring about the extinction...。六月的藏北草原水草丰茂，冰川消融，地壳抬升，青藏高原形成之初，这里就形成了大大小小含盐量极高的湖泊。用劳作换取粮食一直以来就是草原儿女坚守的生存法则，出于对粮食的需求，藏北草原上衍生出了一种独特而古老的生产方式——驮盐。。
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