‘The composition of Earth's core remains a mystery’ says science daily as they take a close look at the secrets of our Planets core, we all know that the outer core mostly consists of molten iron but new research from the Carnegie Institution shows that oxygen, Earth’s dominating gas [oxygen] is rarely found at all in the outer core of our Planet. This discovery then means that we must rethink the period when Earth formed out of clumps of matter. Did oxygen come years after the new Earth was formed or was it just sparse in the early beginnings of our solar system and came to dominance by early microorganisms which breathed it out in abundance.
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MAIN SOURCE: SCIENCE DAILY.