NASAs finds revealed: A different kind of life form.

[The_vagabond7]

DonFerrari said:

And don't forget the theories about Si substituting C in Organic's Chemistry. It would be as possible as this happening =]

@Cthulhu    Arsenic is Gray at least in Water Tanks... so i bet they are gray aliens, didn't saw all the recent movies have they gray?

Honestly, I'd be far far more interested if they managed to get a silicon based lifeform, rather than one that incorporates arsenic in place of phosphorous on some occasions. Once somebody gets a bacteria that use successfully using silicon in place of carbon, that will be newsworthy.