Something's amiss with aliens and arsenic

First comes NASA hinting at a finding tied to extraterrestrial life. But it's just the discovery of arsenic-eating bacteria in Mono Lake. Then come the skeptical scientists.The stage was set by a coy news release from NASA that hinted at a discovery tied to the search for extraterrestrial life. The blogosphere went wild: Had bacteria been found on one of Saturn's moons, or life of some sort on Mars?

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