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How to tell a Moon rock from an Earth rock

Transcript

A true Moon rock tells a story of a world without wind or water. Visually, it might look unremarkable, but its chemistry is a giveaway. It lacks common Earth minerals like quartz and is extremely dry, with no water locked in its crystals. Lab tests reveal a unique fingerprint: a constant iron-to-manganese ratio and very low levels of elements like potassium and sodium, unlike any rock born on our world.