When searching for life on other planets, we tend to look for conditions similar to Earth—after all, that’s the only place we’ve found life in the universe so far. But an astrophysicist recently showed that life on other planets might not need all our Earthly luxuries, like an atmosphere and a sun, to survive. Instead, just like a deep-mine-dwelling bacterium right here on Earth, tiny organisms could get their energy by “eating” the cosmic rays that bombard the universe with radiation.

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