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Aliens haven't contacted us. Scientists found a compelling reason why. (mashable.com)

submitted 1 year ago by ooli@lemmy.world to c/space@lemmy.world

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tectonic planet are rare

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[-] Grandwolf319@sh.itjust.works 5 points 1 year ago

This is the answer,

100 different civilizations could have happened in our galaxy in the last 1 million years with only a few centuries of them emitting detectable signals.

And it could be worse, it could be 10 civilizations in the last 1 billion years.

this post was submitted on 29 Jun 2024

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