What does that mean? Judging by the research interests of the scientists involved in the upcoming announcement, this astrobiological discovery will have something to do with water, evolutionary biology, and aquatic bacteria.
The press conference and the discovery will be announced on Thursday after 11AM PST (2PM EST), NASA will also show a video broadcast of the press conference to journalists at NASA Ames Research Center in Mountain View.
Until then, what do you think this discovery will be? Has extraterrestrial bacterial been discovered preserved in a meteorite? Have we seen evidence of life on a ocean-covered exoplanet?