Earth is 4.54 Billion Years Old — Here’s How We Know
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Earth is 4.54 Billion Years Old — Here’s How We Know
Earth is about 4.54 billion years old — but how do scientists know that? 🌍 Scientists have cracked the mystery using radiometric dating, measuring radioactive decay in the planet’s oldest rocks and meteorites. The result: Earth’s birthday is about 4.54 billion years old. To put that in perspective, if the universe’s history were a ...
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