Arsenic and Old Life

A few days ago, NASA announced that they would be holding a press conference today at 2 pm EST about an important astrobiology discovery. Ever since, there's been rampant speculation among the blogosphere and the news media as to what this announcement might be.

I was hoping for the possibility of life on Titan; but it looks like it may instead be news about life here on Earth incorporating Arsenic instead of Phosphorus into its biochemistry.

Either way, we'll know for sure very soon. The press conference starts in fifteen minutes...