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Here's the story we just broke at NBC:
Tiny Blobs and Tunnels in Meteorite Revive Debate Over Life on Mars
reply to post by JadeStar
Why would SETI be in attendance at an exoplanet announcement? Do they have a program which collects radio signals at the same time that Kepler was collecting the visual data?
That sounds too scienc-fictiony to be true, though, so I expect that the answer is no. Why would they come by, speculatingly.
The new study comes 18 years after researchers announced that they had found evidence of possible Martian lifeforms in a different meteorite from the Red Planet, known as Allan Hills 84001 (ALH 84001). Much of the scientific community was unswayed, however, saying ALH 84001's "nanofossils" could be abiotic in origin.
The new Astrobiology paper is already meeting with similar scrutiny and skepticism, as its authors undoubtedly knew it would.
The evidence is still extremely circumstantial (and very tiny). It would be nice if they could dig into these supposed bacteria chew holes and produce some identifiable remnant of an actual bacteria. Otherwise, there's always going to be the chance that the holes were produced by some other as yet unknown process.
As with anything else, when it comes to alien life, you either prove it exists, or you don't. The answer to the question cannot be expressed as a probability. Alien life can't 50 percent or 80 percent or even 99.9999 percent exist.
reply to post by LeviWardrobe
it could hint at a common or shared origin, or it could also mean that life of a very similar structure is pretty much everywhere where the conditions are similar...which has very exciting possibilities for a Europa mission.
Shuster and Weiss also point out that the lack of heating of the nakhlites and ALH 84001 when they were blasted off Mars indicates how easily undamaged materials can be lifted off Mars and sent to Earth. The inner planets might not be biologically isolated from each other. Life on Mars (if there is life on Mars) might be related to life on Earth. We may all be one big, solar system family.
Most notably, he was the lead author on the 1996 paper in Science on the ALH84001 Martian meteorite that was found in Antarctica. McKay and his colleagues argued that the rock contained evidence for life on Mars.
reply to post by Aleister
Doesn't happen for me and I don't have an account with hte washgionton post.
It's easy to find info. Just google David McKay.edit on 1-3-2014 by jonnywhite because: (no reason given)
Scientific American is heard from, on the subject of the Yamato meteorite, and the fossils suspected of being inside it. The point is emphasized that the minute tunnels are not characteristic of water penetration into stone, which is the other reasonable explanation for them. It is also stressed that the tunnels do closely resemble those made by bacteria eating through rocks for nourishment.
These tubule and microtubule-like structures emanating from a mineral vein strongly resemble structures in material taken from places like the side of Mauna Loa and oceanic crust on Earth. Previous analyses of these Earthly samples have attributed the features to so-called ‘autolithotrophic’ organisms – microbes that eat raw inorganic material, seeking out elements like iron or manganese in particular to drive their metabolism.