It seems that every week, we hear about a new exoplanet that's located smack-dab within its solar system's habitable zone — that warm and cozy Goldilocks area that's suitable for the emergence of life. In turn, some skeptics have contended that the parameters defining the habitable zone are far too liberal and too often misunderstood, or that they're based on criteria that were developed 20 years ago — a time before the first exoplanet was even discovered.
Gizmodo · George Dvorsky
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