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Judi Lynn

(160,530 posts)
Sat Jul 24, 2021, 02:58 PM Jul 2021

Curiosity rover discovers that evidence of past life on Mars may have been erased

By Ben Turner - Staff Writer 8 days ago



The HiRISE camera aboard NASA's Mars Reconnaissance Orbiter captured this photo of the
Curiosity rover on April 18, 2021. (Image credit: NASA/JPL-Caltech/UArizona)

Evidence of ancient life may have been scrubbed from parts of Mars, a new NASA study has found.

The space agency's Curiosity rover made the surprising discovery while investigating clay-rich sedimentary rocks around its landing site in Gale Crater, a former lake that was made when an asteroid struck the Red Planet roughly 3.6 billion years ago.

Clay is a good signpost towards evidence of life because it's usually created when rocky minerals weather away and rot after contact with water — a key ingredient for life. It is also an excellent material for storing microbial fossils.

But when Curiosity took two samples of ancient mudstone, a sedimentary rock containing clay, from patches of the dried-out lake bed, dated to the same time and place (3.5 billion years ago and just 400m apart), researchers found that one patch contained only half the expected amount of clay minerals. Instead, that patch held a greater quantity of iron oxides, the compounds that give Mars its rusty hue.

More:
https://www.livescience.com/mars-life-evidence-erased.html?utm_source=notification

18 replies = new reply since forum marked as read
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Curiosity rover discovers that evidence of past life on Mars may have been erased (Original Post) Judi Lynn Jul 2021 OP
That'll get the Ancient Aliens crew going, for sure... Wounded Bear Jul 2021 #1
Could ancient Martians have erased evidence of their existence? Effete Snob Jul 2021 #3
You been binge watching Ancient Aliens again? Wounded Bear Jul 2021 #4
Perhaps the answer can be found 2,300 miles away in Akron, Ohio Effete Snob Jul 2021 #5
Well, I don't drink any more... Wounded Bear Jul 2021 #6
Then have a gummy bear instead Effete Snob Jul 2021 #7
Yeah, that'll help my diabetes... Wounded Bear Jul 2021 #8
Unsalted peanuts? Effete Snob Jul 2021 #10
Clay. The answer is "clay". ret5hd Jul 2021 #14
How about a shot of Milk of Magnesia? Effete Snob Jul 2021 #15
Well, this one went off the rails... Wounded Bear Jul 2021 #17
Men in Black are responsible exboyfil Jul 2021 #2
Marvin doesn't like visitors Midnightwalk Jul 2021 #9
Indeed... Wounded Bear Jul 2021 #18
On the surface, absolutely Warpy Jul 2021 #11
Kushner scrubbed the evidence? Barr??? NewHendoLib Jul 2021 #12
Current inhabitants punking Curiosity. Sneederbunk Jul 2021 #13
Makes one ponder . . . . Worried2020 Jul 2021 #16
 

Effete Snob

(8,387 posts)
3. Could ancient Martians have erased evidence of their existence?
Sat Jul 24, 2021, 03:09 PM
Jul 2021

And, if so, does this mean they moved somewhere else?

Ancient astronaut theorists say “yes!”

You have to ask yourself, why would the evidence have been erased, and who erased it?

The evidence from NASA definitely indicates with 100% certainty that it could have possibly been the aliens themselves.

Wounded Bear

(58,654 posts)
4. You been binge watching Ancient Aliens again?
Sat Jul 24, 2021, 03:11 PM
Jul 2021


It cracks me up that the "History Channel" plays a marathon of those guys every Friday.

Yeah, that stuff is real history.
 

Effete Snob

(8,387 posts)
5. Perhaps the answer can be found 2,300 miles away in Akron, Ohio
Sat Jul 24, 2021, 03:13 PM
Jul 2021

Every time the Amcient Astronaut Theorists say “yes” you have to take a drink.

Ancient astronaut theorist say “yes” and some of them even go further to ask “can I smoke some of that?”

Wounded Bear

(58,654 posts)
6. Well, I don't drink any more...
Sat Jul 24, 2021, 03:17 PM
Jul 2021

and yes, that means I drink a lot less, like in not at all. Drinking games not my gig.

 

Effete Snob

(8,387 posts)
15. How about a shot of Milk of Magnesia?
Sat Jul 24, 2021, 04:40 PM
Jul 2021

Although I think we recently increased tariffs on all farm products from Magnesia.

Warpy

(111,257 posts)
11. On the surface, absolutely
Sat Jul 24, 2021, 03:44 PM
Jul 2021

Microbes have been detected deep underground in glacial lakes under half a mile of ice. That suggests that there might still be microbial life on Mars, but we're going to have to work hard to find it. The Martian biosphere might be only a few meters thick and under a mile or so of rock.

I would be more surprised if they don't find anything, honestly, lift tends to evolve into whatever environment it can exploit.

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