🔬 Science Aug 12, 2026 · Ethan Siegel

The strongest experimental hint that gravity is quantum in nature

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The strongest experimental hint that gravity is quantum in nature
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If you were to break down the matter in our Universe to its smallest and most fundamental subatomic constituents, you’d find that everything was made up of individual quanta, each of which possesses both wave and particle properties simultaneously. If you pass one of these quantum particles through a double-slit and don’t observe which slit it passes through, the quantum will behave as a wave, interfering with itself on its journey and leaving us with only a probabilistic set of outcomes to desc

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