The image in the Yahoo news entry is an image of: "Giant bacterium Titanospirillum velox". There are quite a few pictures of life-like forms in the meteorites, why not use one of those?
I know nothing about the Journal Of Cosmology, but the tone of this blog entry prevents me from accepting it as useful information, it comes across more as axe-grinding.
But let's assume JoC is a crackpot journal. Why is a NASA scientist publishing there?
Did he decide that NASA's credibility on alien life discoveries has not been damaged enough and he wanted to make it worse?
That said, I have nothing to offer on the actual subject at hand - the validity of the claims.
He's publishing there because he couldn't publish it in a reputable journal, indicating its quality is rather low. I agree that this article doesn't take the most mature tone ever, but it breaks down what's wrong with the article itself further into it. It's unnecessary to rely on credibility at all; of the journal itself OR the fact that the guy worked at NASA.
These are, as one may call the study of "unknown unknowns"
http://daviddobbs.posterous.com/journal-of-cosmology-going-o...
David Dobbs's Wired article on the "meteorite life" story is worth reading:
http://www.wired.com/wiredscience/2011/03/aliens-riding-mete...
http://news.ycombinator.com/item?id=2293947
and then realised that was probably not the link you meant, since it was not the blog post. If you are wondering about the validity of the press release, I trust David Dobbs to quote a press release correctly; I'm guessing the journal is making another go of things.
Seriously? That seems... sad. Borderline pathetic, that they're apparently that insular.
Life on Earth took almost 3 billion years to go from single-celled organisms to multi-cellular ones. 3 billion years is almost as long as the life of the Universe (~13.7 billion years). There's one data point that suggests that there was a big filter in our past.
http://www.overcomingbias.com/2010/11/at-least-two-filters.h...
http://www.overcomingbias.com/2010/03/very-bad-news.html
http://www.overcomingbias.com/2010/11/beware-future-filters....
http://www.overcomingbias.com/2010/11/brain-size-is-not-filt...
http://www.overcomingbias.com/2010/12/berserker-breakout.htm...
Extraordinary claims require extraordinary evidence. Claiming that you've found life inside a rock that has sat in a stew of micro-organisms (the Earth) for thousands of years is one thing, claiming that such life must be extra-terrestrial in origin is another thing entirely and requires a higher standard of evidence.
I'm not saying this isn't just a case of pareidolia (it probably is), but the meteorites haven't been sitting in a stew of microorganisms for "thousands of years".