The Moon’s crater-covered countenance was previously thought to be a youthful 4.42 billion years old, give or take about 10 million years. But now, samples of crystals taken from the rocky satellite half a century ago indicate that the Moon is about 40 million years older than we knew.
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https://gizmodo.com/apollo-mission-samples-reveal-the-moon-is-more-ancient-1850950960
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