By now you've likely heard about the bacterium
discovered in California's Mono Lake:
The study, published in the journal Science, demonstrates that one of the most notorious poisons on Earth can also be the very stuff of life for some creatures. * * * * "Life is mostly composed of the elements carbon, hydrogen, nitrogen, oxygen, sulfur and phosphorus," the researchers write in Science. These six elements make up the nucleic acids -- the A, C, T and G of DNA -- as well as proteins and lipids. But there is no reason in theory why other elements should not be used. It is just that science never found anything alive that used them. * * * * .. it does suggest that astrobiologists looking for life on other planets do not need to look only for planets with the same balance of elements as Earth has. "Our findings are a reminder that life-as-we-know-it could be much more flexible than we generally assume or can imagine," said Wolfe-Simon.