Opus 2

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~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.

Top of pageBibliographic references

- Spektrum der Wissenschaft- Spezial 02-2007," RAUMSCHIFF ERDE", Spektrum der Wissenschaftverlagsgesellschaft mbH,Heidelberg-De, ISSN 0943-7096 / ISBN978-3-938639-65-8.

- Pour la science, Dossier nr 60, 07/08-2008, "Où EST NÉE LA VIE?", Paris-Fr, ISSN 1 246-7685.

- "La vie terrestre apparut il y a environ 4 milliards d’années dans l'eau des océans.", "DE L'ORIGINE DE LA VIE A LA VIE DANS L'UNIVERS", André Brack, www.cnrs.fr

Top of pageFor further reading...

- "LA STRAORDINARIA STORIA DELLA VITA" di Piero e Alberto Angela, 1998 Arnoldo Mondadori Editore, Milano-Italia, EAN :9788804457534/ISBN: 8804457538

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~3,8 Ga
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