These are interesting findings.
The general idea is by no means new: the Journal of Cosmology has published a few papers with micrographs of such structures, advancing the theory
that they are diatoms of extraterrestrial origin before. I might be mistaken, but just going from memory I think these claimed diatoms are more
intricate than the ones presented in past papers, which probably favours a biological origin for them. However, the authors reasons for ruling out
terrestrial cross-contamination are less than compelling, and there is also a still-strong possibility that they are crystals of a non-biological
Finally, without devolving into an ad-hominem attack, it must be noted that the quality of the Journal of Cosmology's peer-review process has been
questioned extensively in the past. That doesn't indict the content of the article, of course, but it does mean that we have to look at it with
heightened skepticism compared with articles appearing in more scholarly sources.
edit on 14-1-2013 by DiogenesTheDog because: Forgot an important qualifier.