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Moon To Mars
microcrystal contamination


Tiny spherical crystals, called microspherules, glow a fluorescent orange when a green laser pointer shines on them. Researchers used the the crystals to simulate possible contamination by microbes during Mars simulations in the Utah desert. The left image shows a soil sample, while the right shows the same sample under a laser beam. Microspherules show up as white dots in the right panel. Image Credit: Groemer et al.

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