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Sri Lankan Meteroite claimed to contain fossilized extraterrestrial diatoms

tbg58 (942837) writes | about a year ago


tbg58 (942837) writes "An article in the January 10 issue of the Journal of Cosmology reports the discovery of diatom frustules in a carbonaceous meteorite which fell in Sri Lanka in December of last year. The article includes micrographs of structures in the meteorite which resemble fossilized diatoms. If verified, the significance of this find is historic."
Link to Original Source

1 comment

Interesting but (1)

turkeyfish (950384) | about a year ago | (#42659269)

The article is most interesting but fails to systematically address the nature of the sediment in which the supposed meteorite precisely fell. With high impact, should the meteorite have fallen in a sedimentary bed, a high probability given the sample is from Sri Lanka, that the "meteorite" could not have been contaminated by fossils from the surrounding sediment. Ockham's razor would suggest that a nearby site of origin be excluded before an extraterrestrial origin be offered as an explanation.

It is hard to image why "diatoms" of exobiological origin, should so be so similar to those of a "terrestrial diatom" common in the epipelon of muds that are rich in organic matter, in eutrophic lakes and ditches, unless of course, they are precisely of terrestrial (earth) origin. Such diatoms are quite common in fossil beds of suitable age. No evidence is presented that eliminates the possibility that the fragment of the "meteorite" found was the result of a bounce or "ricochet" that may have at first impacted elsewhere, perhaps nearby or perhaps accretion that occurred with the impact of the meteorite with diatoms "ejected" from the earth in near earth orbit prior to immediate impact.

That said, finding diatoms on mars or other planets or asteroids would certainly provide additional evidence to speculate on the origin of what clearly appear to be diatoms in an object of presumptive exobiological origin.

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