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Physically speaking, our Universe seems uncannily perfect. It stands to reason that if it wasn’t, life as we know it – and planets, atoms, everything else really – wouldn’t exist.
Now, three physicists from the US, France, and Korea have put forward a new explanation for why life, the Universe, and everything in it has had such a prime opportunity to exist at all.
For some reason, the amount of energy – or more precisely, the mass it equates – and the Universe’s accelerating expansion are so neatly balanced, there’s been ample opportunity for a few interesting things to unfold over the past 13 billion years or so.
A few magnitudes either way, and the overwhelming gravity would have glued the expansion of spacetime together better than a mouthful of taffy… or been so weak, the rapidly expanding Universe would have left little of interest in its wake.
Such an apparent near-perfect balance might be a consequence of something called fine-tuning, a process in physics where the features of a system necessarily match or cancel out with such precision. If it didn’t, the system just wouldn’t look the way it does.
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(Supoj Buranaprapapong/Moment/Getty Images
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