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THERE is an old philosophy question about a tree in a forest. If it falls with nobody there to hear it, does it make a sound? Ask a quantum physicist and they might say the sound was there – but you couldn’t be sure the tree was.
has long pushed the boundaries of our understanding of reality at its tiniest. Countless experiments have shown that particles spread out like waves, for instance, or seem be in more than one place at once. In the quantum world, we can only know the likelihood that something will appear in one…
