Learning how to study the leopard-like spots found on both terrestrial and Martian rocks can prepare scientists for when the real samples arrive from space. A curious red Martian rock nicknamed Sapphire Canyon has scientists excited, as its spotted appearance hints at possible organic origins. On Earth, researchers tested a powerful laser technique, O-PTIR, on a similar rock found by chance in Arizona, proving it can rapidly and precisely reveal a material’s chemical makeup...
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