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From: RonO <rokimoto557@gmail.com>
Newsgroups: talk.origins
Subject: Re: Curiosity rover detects long-chain carbon molecules on Mars
Date: Thu, 27 Mar 2025 17:44:16 -0500
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On 3/27/2025 4:31 PM, Pro Plyd wrote:
> 
> https://www.science.org/content/article/curiosity-rover-detects-long- 
> chain-carbon-molecules-mars
> 
> NASA’s Curiosity rover has detected what
> could be a chemical relic of long-ago life
> on Mars: long-chain organic molecules. Found
> after painstaking reanalysis of data on a
> sample drilled from a lake that dried up
> billions of years ago, the molecules likely
> derived from fatty acids, a common building
> block of cell membranes on Earth. The finding,
> published today in the Proceedings of the
> National Academy of Sciences, is not a
> definite detection of past life; the fatty
> acids could also have formed without life.
> But it’s another in a series of tantalizing
> hints.
> 
> “This is an amazing result,” says Monica
> Grady, a planetary scientist at the Open
> University who wasn’t involved in the new
> research. If these are “breakdown products
> from carboxylic acids, then we are seeing
> something very exciting indeed.” It also
> suggests Curiosity’s successor,
> Perseverance, will find similar molecules,
> says Jack Mustard, a planetary scientist
> at Brown University. Perseverance is
> collecting samples for an ambitious effort
> to return Mars rocks to labs on Earth,
> where scientists will be able to reach
> more definitive conclusions on the
> molecules’ origins.
> 
> 
> https://www.pnas.org/doi/abs/10.1073/pnas.2420580122
> Long-chain alkanes preserved in a Martian mudstone
> 
> Significance
> Decane, undecane, and dodecane were detected
> in a Martian sample at the tens of pmol level
> and may originate from long-chain carboxylic
> acids. The detection of long-chain alkanes in
> the Sheepbed mudstone is important for
> extending studies of habitability on Mars as
> the Curiosity rover continues to map out
> windows of high preservation potential for
> chemically reduced organic compounds. The
> provenance and distribution of these molecules
> are of high interest in the search for
> potential biosignatures on Mars.
> 
> Abstract
> Organic molecules preserved in ancient Martian
> rocks provide a critical record of the past
> habitability of Mars and could be chemical
> biosignatures. Experiments conducted by the
> Sample Analysis at Mars instrument onboard
> the Curiosity rover have previously reported
> several classes of indigenous chlorinated and
> sulfur-containing organic compounds in Gale
> crater sedimentary rocks, with chemical
> structures of up to six carbons. Here, we
> report the detection of decane (C10H22),
> undecane (C11H24), and dodecane (C12H26) at
> the tens of pmol level, released from the
> Cumberland drilled mudstone sample, using a
> modified SAM analytical procedure optimized
> for the detection of larger organic molecules.
> Laboratory experiments support the hypothesis
> that the alkanes detected were originally
> preserved in the mudstone as long-chain
> carboxylic acids. The origin of these
> molecules remains uncertain, as they could
> be derived from either abiotic or biological
> sources.

Maybe there is oil on Mars.

Ron Okimoto