Methane-based lifeforms on Saturn's moon Titan? Two seperate papers coming out dealing with the research data from NASA's Cassini probe suggest this possibility.
The first paper that apears in the journal Icarus shows that hydrogen gas in the Titan atmosphere disappears at the surface. To scientists, this suggests that it is being breathed by alien bugs of some kind.
The second paper, appearing in the Journal of Geophysical Research, states that there is the lack of a certin chemical (acetylene) on the surface. Another indicator for methane-base life.
But scientists warn that there could be other explanations for these results as well.
For more details, check out the article below.
Ref. Daily Mail. June 5, 2010. (http://www.dailymail.co.uk/sciencetech/article-1284013/Do-aliens-live-Saturn-moon.html).