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Episode 172: The Moon's Bullseye

Play Jul 24•4:25

A new, Earth-based radar has examined material ejected from a massive impact on the Moon. The impact early in the Moon's history, by an asteroid 20-40 miles in diameter, created the crater known as Mare Orientale, a huge basin 600 miles across. Its study may help us better understand the early impact history of both Moon and Earth, and the role these impacts played in our planet?s evolution. ...

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