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Many Worlds

Searching for the Edge of Habitability

21 Aug 2019, 15:13 UTC
Searching for the Edge of Habitability NASA/JPL/USGS

How many habitable worlds like our own could exist around other stars? Since the discovery of the first exoplanets, the answer to this question has seemed tantalizingly close. But to estimate the number of Earths, we first need to understand how our planet could have gone catastrophically awry.

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