Why our galaxy probably isn't full of alien civilizations killed off by climate change

Why our galaxy probably isn't full of alien civilizations killed off by climate change

- in Science
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By Seth Shostak

Could it be that climate change is a universal menace?

A recent article in Forbes addresses the idea that the galaxy might be strewn with extinct alien civilizations, burned to a crisp by ferocious planetary warming. The idea is certainly intriguing, and has obvious relevance as a cautionary tale for us. But could it be true?

The article doesn’t say these hypothetical societies died out thanks to an alien fondness for SUVs. Instead, the aliens are hypothesized to be the victims of a natural process — the aging of their home star — coupled with the bad luck of having no planet similar to Venus in their solar system.

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