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Chemical Fossils Probably Detected on Mars.

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Last updated on June 14, 2018
NASA’s Mars rover Curiosity detected “Organic matter preserved in 3-billion-year-old mudstones at Gale crater, Mars“: “At least 50 nanomoles of organic carbon persists, probably as macromolecules containing 5% carbon as organic sulfur molecules.” (note 1)

“Organosulfur compounds are organic compounds that contain sulfur…. Fossil fuels, coal, petroleum, and natural gas, which are derived from ancient organisms, necessarily contain organosulfur compounds, the removal of which is a major focus of oil refineries.” (note 2)

“The Curiosity rover has detected organic deposits similar to kerogen in mudstone samples in Gale Crater on Mars.” (note 3)

Kerogen is a macromolecule that weighs more than 1,000 atomic mass units. Kerogen exists in coal and oil shale. When heated, kerogen can release crude oil, which contains organic sulfur molecules. Kerogen was formed by life only (note 4).

Note 1: quoted from the abstract of the article at
Note 2: quoted from the first paragraph in



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