'No one dared question his results': How thermodynamics sparked a heated debate about Earth's age in the 19th century
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In the 1950s, American geochemist Clair Patterson presented findings that showed Earth is around 4.55 billion years old. His evidence was based on lead isotopic analysis that he used to calculate the age of the Canyon Diablo meteorite, which was discovered in Arizona in 1891. That result is now widely accepted as the age of our planet, but the buildup to this discovery was a long time coming. Earth's true age was a subject of much debate among scientists in the 19th century. And rather than geol
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