
In about a billion years, the Sun is forecasted to brighten up and turn the Earth into a desert like Mars. Based on the star formation history of the Milky-Way galaxy, about half of the Sun-like stars formed more than a billion years before the Sun. If some of these suns hosted a habitable Earth-like planet, and life on that planet led to the emergence of an intelligent species more than a billion years ago, then this species must have suffered from a devastating astrophysical catastrophe by now. In that case, it would be appropriate for us, as cosmic citizens…
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