<ul><li>A radioactive anomaly, specifically an overabundance of beryllium-10, has been discovered in deep ocean rocks.</li><li>The beryllium-10 anomaly could be evidence of a cosmic event or major changes in ocean circulation around 10 million years ago.</li><li>Beryllium-10, typically formed in the upper atmosphere, accumulates in the oceans and can be used to date geological samples older than 10 million years.</li><li>Further research is needed to determine the cause of the beryllium-10 anomaly and its implications for the geological record.</li></ul>

Radioactive anomaly appears in the deep ocean

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