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NASA, You're Such a Tease.

An exciting astrobiology finding reveals bacteria using arsenic instead of phosphorus, sparking discussions on life beyond Earth.

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When NASA announced that they were going to hold a press conference about "an astrobiology finding that will impact the search for extraterrestrial life," I was pretty excited--especially when I read that the details had been embargoed (that is, people at the journal publishing the paper weren't allowed to talk about it ahead of time). To make sure we got the hint, NASA reminded readers that "Astrobiology is the study of the origin, evolution, distribution and future of life in the universe."

What would the discovery be? The odds that SETI had finally received their alien phone call seemed slim. But maybe researchers had spotted solid evidence of alien bacteria on Saturn's moon Titan, or some other rock in the solar system. After all, there have been some tantalizing hints in that direction recently.

The press conference was schedule for 2:00 ET yesterday, but a few hours earlier, the story ...

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