As a science geek, stuff like this really excites me.
The team used two different mass-spectrometry techniques to confirm that the bacterium’s DNA contained arsenic, implying — although not directly proving –that the element had taken on phosphate’s role in holding together the DNA backbone. Analysis with laser-like X-rays from a synchrotron particle accelerator indicated that this arsenic took the form of arsenate, and made bonds with carbon and oxygen in much the same way as phosphate.
It’s bouncing all over the web today, but this quote was mined from a post at BoingBoing: Weird life found on Earth—kind of.


