NASA gave a big press conference today, announcing that they found a bacterium which is able to substitute phosphorus with arsenic.
"Whoop–de–do", you might think.
Well, for EVERY other known life form phosphorus is essential. It's one of the main buildings blocks of cell components. DNA has a phosphorus-backbone. ATP, the main storage of energy in every cell, is adenosine-tri-phopshate.
This is BIG.
Link: Science Magazine & NASA Announcement
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