Cool Early Earth

The Cool early Earth (CEE) theory posits that the early planet Earth had a calm influx of bolides and a cool climate allowing fluid water, after the planetary accretion but before the occurrence of the Late Heavy Bombardment in the Hadean geological eon. The Cool Early Earth is believed to have been the state for some hundreds of million years around 4.2 billion years (Ga) ago. This Cool Early Earth theory is supported by supposed water conditions at the creation of detrital zircon at Jack Hills in Western Australia, dated to about 4.0–4.4 Ga ago, some time after the planetary accretion era of the early Hadean. The Cool Early Earth was immediately followed by the Late Heavy Bombardment.

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Famous quotes containing the words cool, early and/or earth:

    The cool kindliness of sheets, that soon
    Smooth away trouble; and the rough male kiss
    Of blankets.
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    And early in the morning he came walking toward them on the sea.
    Bible: New Testament, Matthew 14:25.

    I set out on this ground, which I suppose to be self evident, “that the earth belongs in usufruct to the living”: that the dead have neither powers nor rights over it.
    Thomas Jefferson (1743–1826)