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Through a series of chemical reactions the ice has created oxygen.
冰通過一系列化學反應制造氧氣。
While the planet was frozen,
地球結冰時，
the Sun's ultraviolet rays reacted with water
太陽紫外線與冰里的水分子起作用
molecules in the ice, to produce hydrogen peroxide, a chemical rich in oxygen.
制造富含氧的化學物質－－過氧化氫
Now, as the ice melts, the hydrogen peroxide breaks down and releases massive amounts of oxygen.
此時冰融化，過氧化氫分解并釋放大量的氧。
The Earth is waking up,
地球漸漸醒來，
and it's a very different place.
它變得截然不同。
600 million years ago, the atmosphere is warmer, like a summer day.
6億年前的大氣比較暖和，感覺像夏天，
And the days are about 22 hours long.
而且一天大約持續22小時，
Add all this water and it's the perfect recipe for life.
加上這些水，就成了創造生命的完美環境。
Before Snowball Earth, primitive bacteria emerged in the oceans.
雪球地球期前，海里已有原始細菌，
But surely they couldn't have survived an ice age 75 times longer than the entire span of human history.
但它們絕不可能熬過比人類歷史長了75倍的冰河期。
