This has the potential to be a bit earth-shaking:

The buzz is building over a paper by Richard Hoover, an award-winning astrobiologist at NASA’s Marshall Space Flight Center, concluding that filaments and other features found in the interior of three specimens of a rare class of meteorite appear to be fossils of a life form strongly resembling cyanobacteria. Chemical analysis, Hoover argues, shows no evidence that the fossils are of organisms that infiltrated the meteorites after they arrived on Earth.