Most of you probably saw the reports that NASA scientists were able to grow bacteria that incorporated arsenate into their DNA in the absence of phosphate. But it appears that their results can't be reproduced. Kind of disappointing.
This is the link to the original article in case someone missed it http://www.wired.com/wiredscience/2010/12/nasa-finds-arsenic-life-form/
An article about the new experiment http://www.sciencenews.org/view/generic/id/338090/title/Arsenic-based_life_finding_fails_follow-up
Finally, if you're interested, the paper can be downloaded (FREE!) as a PDF here-
http://arxiv.org/find/all/1/all:+GFAJ-1/0/1/0/all/0/1
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