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The original was posted on /r/science by /u/Odd-Ad1714 on 2023-08-31 07:05:30.

Original Title: Rare oxygen isotope detected at last — and it defies expectations. By combining a powerful set of instruments with some experimental savvy, physicists have for the first time detected oxygen-28 — an isotope of oxygen that has 12 extra neutrons packed into its nucleus.