One hidden feature of the Moon has been unearthed by scientists and it’s very, very big, and very, very heavy.
Buried beneath its South Pole-Aitken basin – one of the largest preserved craters in the Solar System – is a structure which weighs at least 2.18 billion kilogrammes and measures more than 300km (186 miles) in depth and 2,000km (1,243 miles) in length.
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