Astrobiologist at NASA’s Marshall Space Flight Center Richard B. Hoover has identified extremely small microscopic bacteria in several meteorites. Fossils of bacteria found in a rare class of meteorite called CI1 carbonaceous chondrites.
Fossils of bacteria
Richard B. Hoover
The following are a few of the many reports that talk of his findings:
Journal of Cosmology
The following reports are from mainstream media. Some do the usual dismissal of the findings or try to make it 'funny':
Daily Mail 1
Daily Mail 2