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With the help of a tiny fragment of zircon extracted from a remote rock outcrop in Australia, the picture of how our planet became habitable to life about 4.4 billion years ago is coming into sharper focus. New research reveals data that confirms that Earth’s crust first formed just 160 million years after the formation of our solar system. It also confirms that the timeframe that the planet was a fiery ball covered in a magma ocean came earlier, and that in order to become habitable, Earth cooled and formed its crust during the first geologic eon of the planet. The research may help scientists to understand how other habitable planets may form.

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