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:
“In my skull,
from which vision took flight,
will come wine
will pour song
of the cool night.”
—Hilda Doolittle (1886–1961)
“Today’s pressures on middle-class children to grow up fast begin in early childhood. Chief among them is the pressure for early intellectual attainment, deriving from a changed perception of precocity. Several decades ago precocity was looked upon with great suspicion. The child prodigy, it was thought, turned out to be a neurotic adult; thus the phrase “early ripe, early rot!””
—David Elkind (20th century)
“It is, I think, an indisputable fact that Americans are, as Americans, the most self-conscious people in the world, and the most addicted to the belief that the other nations of the earth are in a conspiracy to under value them.”
—Henry James (1843–1916)