NOT SAYING IT'S ALIENS, BUT...

Apparently the ancient Egyptian king Tutankhamun was buried with a dagger comprised largely of meteorite. In the 3,300 years since the king’s burial, the blade has barely shown any signs of rust.

Imgur link (which, subsequently, has several other links) for further reading: https://imgur com/a/TajIO

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Jeff ShoemakeESCAPE! Alaska