• wjrii@kbin.social
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    1 year ago

    The article says they used luminescence dating to measure the amount of radiation the surrounding soil had soaked up over time:

    Grains of rock absorb natural radioactivity from the environment over time - essentially charging up like tiny batteries, as Prof Duller put it.

    And that radioactivity can be released and measured by heating up the grains and analysing the light emitted.