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Evidence of ancient life on Mars has been ‘erased’, Nasa scientists say

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Posted: 20/07/21 - 11:09
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Evidence of ancient life on Mars has been ‘erased’, scientists say, as Nasa’s Curiosity rover has found parts of the Red Planet’s rock record has been removed.

Using the CheMin (Chemistry & Mineralogy X-Ray Diffraction) tool, scientists compared samples taken from two areas approximately 400 meters from each other. Surprisingly, they discovered that half of the clay minerals they expected to find in one area were missing; they were replaced with mudstones rich with iron oxides, which give Mars is red colour.

It is likely that the briny water filtered through overlaying sediment layers is the reason why the rock record has disappeared. The salty water likely originated from lakes that existed when Mars was drier, unlike the freshwater lakes which would have been present when the mudstones formed.

I Call Bull: #ClickBait headline, nothing nefarious happening here just that the minerals had been washed out of one sample 400m away from another one.

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3 Comments
61 days
2 upvotes
Or it was probably never there in the first place.
62 days
3 upvotes
Titillating headline belies quite a pedestrian explanation really then.
62 days
2 upvotes
Strange wording to use, trying to make it all sound a bit more exciting than it is