A vast mountain range rises up over 27,000 feet.
巨大山脉隆起,超过20000公尺,
These are the Himalayas.
这是喜马拉雅山,
And the highest mountain of all, Mount Everest.
这是世界第一高峰--珠穆朗玛峰。
Its summit reaches up into the Earth's jet stream,
它的顶峰伸入地球喷流,
the same altitude where planes fly.
即飞机飞行的高度。
When the snow on the peaks melts, it feeds rivers like the Ganges, Indus, Yellow and Yangtze.
顶峰的融雪成为大河源头,如恒河、印度河、长江与黄河。
The Himalayas are like a vast water tower.
喜马拉雅山有如巨大水塔,
One day, their rivers will supply water for almost half the world's population.
迟早有一天,这些发源于此的河流将为世上近一半的人供水,
20 million years ago, this is our planet,
2000万年前,这就是地球,
with every continent, and every ocean as we know it.
大陆与海洋都是我们熟悉的模样,
Except one thing is still missing, the human race.
只不过少了一样东西,就是我们人类。
And for humans to evolve, something needs to change.
人类若要演化,某些地方就需要改变。