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The discovery of a second Earth could be a sign that mankind is close to extinction

Last week, NASA announced the discovery of the planet Kepler-186F, the first exoplanet with the same size as Earth, located in the habitable zone of its star. In theory, there could be liquid water and even life forms on this second Earth, and if we want to go the extra mile we can even presume that these life forms are intelligent. But the experts believe that the existence of life on other planets isĀ  not such a good sign for our...