'Rosetta stone' of Mars: Two-pound rock turns out to be 4-billion year old piece of red planet

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Starlust'Rosetta stone' of Mars: Two-pound rock turns out to be 4-billion year old piece of red planetyesterday · By Harsh Vardhan

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fox5ny.com‘Rosetta Stone for Mars’ gives glimpse of the Red Planet’s very early days1 days ago

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MashableThis Martian meteorite just got dubbed a 'Rosetta Stone.' Here's why.2 days ago · By Elisha Sauers

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