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Rare asteroids near Earth may become targets for space mining

And these priceless chunks could offer clues about an even greater cosmic treasure.

An artist’s rendering of asteroids in the asteroid belt.

Scientists just calculated that one of two metallic asteroids floating in Earth’s vicinity may contain precious metals worth about $11.65 trillion. The expensive nugget, in fact, could boast more iron, nickel and cobalt than the entirety of our global metal reserves.

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