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The days may pass quickly but the Earth changes slowly.
一天过得快，但地球变得慢。
To understand the making of our planet we need to fast forward through millions of years.
要了解我们的行星是如何形成，必须将时间快转数百万年。
3.9 billion years ago, a hail of meteors attack the Earth. It's debris left over from the solar system's formation.
39亿年前，我们遭太阳系形成时剩余的碎屑攻击。
Inside the meteors are crystals that look like grains of salt.
瞧瞧流星里这些奇怪的晶体，它们看起来像盐粒。
And inside the crystals are minute droplets of water.
它们内部有细小水滴。
These deadly missiles could contain the vital ingredient for life on Earth.
看来这些致命飞弹可能含有赋予地球生命的关键要素。
Only a small amount of water exists inside each meteorite,
每颗陨石各只有微量的水，
but as they bombard the Earth for over 20 million years,
然而它们轰炸地球超过两千万年，
pools of water grow.
水池纷纷出现。
The Earth's core remains molten,
水聚集在坚硬地表，
but its surface has cooled enough to form a crust.
地心依旧是融熔状态。
The air is around 170 degrees.
但地表已降温至7、80摄氏度。
In the future, there's a chance we could swallow this very water.
未来我们喝的可能就是这种水。
Every sip, every puddle, every drop of water in every ocean, is billions of years old.
每一口、每一滩，跟海里的每一滴水，都有数十亿年历史。
And it may have travelled millions of miles to reach us, carried inside a meteor.
它或许移动数百万公里，随着流星来到这里。
The Earth looks more familiar,
这样的地球看来比较熟悉，
but it's still a dangerous place.
但危险依旧存在。
Winds are faster than the most destructive hurricanes today.
这阵风的速度等于甚至超越破坏力最强的飓风。
