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THE ORIGINS OF LIFE  ~3,8 billion years

Half a billion years after its formation the Earth developed a solid crust. The gigantic destructive volcanoes had calmed down, the heavy rains had stopped filling the primitive ocean that had developed. The bombardment of comets and other asteroids couldn’t trouble the sky with its primordial atmosphere any more.

The conditions on Earth now being favourable, the apparition of life had become possible.

But when, where, and how did this miracle take place?

It is difficult to answer these fundamental questions with certainty. The conveyor belt of plate tectonics (see -200,000 ; Pangaea) erased the traces of this era long passed.

The oldest traces of assumed life were found in Greenland. They are about 3.8 billion years old.

 

生命的起源 ~38億年前

在地球誕生五億年後,終於有了固態的地殼。巨大且具破壞性的火山開始冷卻,豪雨停歇之後,原始的海洋誕生了。透過原始大氣層的保護,彗星或其他星體的撞擊再也不能造成困擾了。

地球的狀態此時有利於生命的誕生。但這奇蹟在何時?何地?而且如何發生的?

很難明確回答這些最根本的問題。板塊運動(見 紀元前二十萬年; 盤古大陸)消除了這遠古世代的痕跡。疑似最古老的痕跡在格陵蘭被發現,約莫38億年前。

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