NASA astrobiologist Dr. Richard B. Hoover claims he has found a fossil of an extra-terrestrial bacteria in a meteorite. Details on how the discovery was made can be read at DailyTech.
The meteorite was reportedly broken under carefully controlled sterile conditions. Now the only unknown is whether the meteorite could have somehow been contaminated. The meteors were sterilely harvested in the frigid reaches of Antarctica immediately after their observed fall. The fact that they were collected so quickly limits the possibility that indigenous microbes contaminated them. The possibility of atmospheric contamination still remains, though.
Dr. Hoover believes that this is not a case of contamination. He is convinced that he has become the first human to record a scientifically verifiable encounter with an alien being. He states in a recent interview, "I interpret it as indicating that life is more broadly distributed than restricted strictly to the planet Earth. This field of study has just barely been touched -- because quite frankly, a great many scientist would say that this is impossible."