On the ISS, a humble mold becomes a metal miner. We break down the BioAsteroid experiment, where Penicillium simplicissimum outpaces abiotic chemistry in microgravity to extract palladium from a meteorite, while a rival bacterium forms a protective barrier. We explore why palladium matters for space life support and how in-situ resource utilization could turn biology into a scalable off-Earth factory.

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