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A slight variation in the masses of primordial black holes turns the expected gravitational 'concert' into a barely perceptible whisper.
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Among primordial black holes, every gram counts. A tiny mass non-uniformity, predicted by gravitational theory, rules out the loudest gravitational 'echo' of the early Universe — and paves the way for new dark matter searches.
🎯 If all primordial black holes had the same mass, they would create a gravitational 'roar' as powerful as the Big Bang. But nature opted for a whisper.