'Pale orange dot': Early Earth's haze may give clue to habitability elsewhere in space

  • November 13, 2015
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'Pale orange dot': Early Earth's haze may give clue to habitability elsewhere in space
An atmospheric haze around a faraway planet -- like the one which probably shrouded and cooled the young Earth -- could show that the world is potentially habitable, or even be a sign of life itself.

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