What is NASA Going to Tell Us?

Tomorrow (Thursday), NASA will announce something about an "astrobiological finding". Many news agencies are posting reports like this one that are talking about the buzz on the web about the upcoming announcement. I wonder what it will be. The discovery of an alien life form? The discovery of evidence of life (no matter what scale) on Mars? Maybe even a new theory on life formation that might broaden our search overall? Who knows. 1PM U.S. Eastern Standard Time is when it will be announced. No matter what it is, I am looking forward to it!