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November 30 2013

Could aliens be easiest to find while they die?


Astrobiology is the search for and study of life elsewhere in the universe, and it is obsessed with beginnings. Most experts in the field spend their time concocting theories about the origins of life, because knowing what life requires to get started lets us narrow the list of places we need search for it. However, determining life’s starting conditions is just one aspect of the search for life, and as we see on Earth, life can profoundly affect a planet once it gets a foothold. Rather than ask what life’s beginnings might look like on another planet, astronomers are beginning to wonder how a planet might look as its biosphere comes slowly to its end.

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