I wonder what is early development

Discussion in 'Earth Science' started by timojin, May 16, 2016.

  1. timojin Valued Senior Member

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  3. timojin Valued Senior Member

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    more clue about our planet formation.
    Scientists have found evidence of a huge asteroid that struck the Earth early in its life with an impact larger than anything humans have experienced. Tiny glass beads called spherules, found in north-western Australia were formed from vaporized material from the asteroid impact, 3.46 billion years ago.

    https://www.sciencedaily.com/releases/2016/05/160516095132.htm

    Cyanobacteria are photosynthetic organisms, a relatively complex lifeform. The earliest fossils recorded so far are those of sulfur-reducing bacteria in Western Australia. It is certain that cyanobacteria evolved from something like iron- or sulfur-reducing bacteria. The first living things appeared about 400 million years before the earliest fossils were laid down. Those were probably ribozymes, which were self-catalyzing, self-replicating molecules of a single-strand nucleic acid such as ribonucleic acid or glycol nucleic acid.
    The formation of marble have anything to do with asteroid impact ?
     
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