Has Nasa found life beyond Earth?

Blogger Jason Kottke tipped NASA would announce the discovery of arsenic on Titan, or possibly chemical evidence of bacteria utilising it for photosynthesis.
That speculation was quickly picked up and repeated by a number of other bloggers and internet sites.
However Kottke theory has been rebuffed by Alexis Madrigal, senior science writer for The Atlantic, who tweeted that he had read the Science article relating to the Nasa announcement.
''I'm sad to quell some of the @kottke-induced excitement about possible extraterrestrial life. I've seen the Science paper. It's not that,'' he tweeted.
The American Association for the Advancement of Science, which publishes the journal in which the research will appear, told ABC News in the US that it had received numerous inquiries about the "mostly erroneous online and/or tabloid speculation about the forthcoming research''.
"These reports clearly are not based on the peer-reviewed research being published under the auspices of the journal Science," it said.




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