In a 3.5-billion-year-old clay-rich rock from Gale Crater, NASA’s Curiosity rover identified 21 carbon-based molecules — including a nitrogen-bearing ring structure linked to the chemistry that can precede RNA and DNA — showing that ancient Martian sedime

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In a 3.5-billion-year-old clay-rich rock from Gale Crater, NASA’s Curiosity rover identified 21 carbon-based molecules — including a nitrogen-bearing ring structure linked to the chemistry that can precede RNA and DNA — showing that ancient Martian sedime Space Daily A Surprising