A new NASA-funded study backs the 'Great Filter' theory as a solution to the Fermi paradox that, even though alien civilizations are highly probable, we've never heard. The off-world radio silence is because other civilizations kill themselves off with climate change, racism, inequity, political division, nuclear weapons and such, before they develop a way to contact us.

Is this a scientific paper, or a political prescription to save our own planet from existential threats?

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