boulder on the moon with earth above

Earth hangs above a large boulder examined by Apollo 17 astronauts Gene Cernan and Jack Schmidt in December 1972. A recent analysis of freshly opened samples from Apollo 17 found that the Moon is at least 4.46 billion years old, or roughly 40 million years older than revealed by other samples. [NASA]

Find out more in our radio program entitled Moon and Gemini.

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