Mining Rare Earths and Metals From Asteroids Is an Expensive Challenge

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A small slice of Piguem Nonralta sits on Matt Gialich’s desk. The metallic ball, roughly the size of a doughnut hole, was discovered in Argentina in 1576 when Spanish colonizers went searching for iron ore and stumbled on the scattered remnants of a 4,000-year-old meteor shower. Piguem Nonralta, the name the Indigenous population gave to the asteroid craters, roughly translates to “field of heaven.” Gialich, the 37-year-old entrepreneur at the helm of a startup seeking to mine asteroids, keeps the ancient nugget at his office in Pasadena, California, as a reminder of his company’s celestial ambitions.

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