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How We Know Earth Is 4.5 Billion Years Old | Radioactive Dating Explained w/ Cox
Earth is about 4.5 billion years old—but how do scientists figure that out? 🌍 The answer lies in tiny radioactive atoms inside rocks that act like natural clocks. By measuring how these atoms decay over time, scientists can precisely date Earth’s age. Combined with evidence from plate tectonics and continental drift, we get a clear ...
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