this sounds just like the film "Evolution"
First Known Microbe on Earth Able to Thrive and Reproduce Using Arsenic
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Dec 2, 2010
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#3
Toxic is a relative term. I mean it's not the same for all organisms. But this is a very extreme example. It reminds me of a wonderful site I found on the Internet many years ago about the variations on the genetic code - it's not quite as universal as is often claimed. Unfortunately I can't find this site or anything similar these days.
http://www.sciencedaily.com/releases/2010/12/101202140622.htm
"ScienceDaily (Dec. 2, 2010) — NASA-funded astrobiology research has changed the fundamental knowledge about what comprises all known life on Earth."
"Researchers conducting tests in the harsh environment of Mono Lake in California have discovered the first known microorganism on Earth able to thrive and reproduce using the toxic chemical arsenic. The microorganism substitutes arsenic for phosphorus in its cell components."