'Goldilocks' Planet Raises Question: Is Water Enough for Life to Begin?

'Goldilocks' Planet Raises Question: Is Water Enough for Life to Begin?

A team of planet hunters announced this past week the discovery of an “Earth-sized” planet that it said could be “potentially habitable” though one side of the planet is perpetually night and always freezing cold and the other side is perpetually day and always blazing hot.

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