Pockets of microbes have been found living within a sealed fracture in 2-billion-year-old rock. The rock was excavated from the Bushveld Igneous Complex in South Africa, an area known for its rich ore deposits. This is the oldest example of living microbes being found within ancient rock so far discovered. The team involved in the study built on its previous work to perfect a technique involving three types of imaging -- infrared spectroscopy, electron microscopy and fluorescent microscopy -- to confirm that the microbes were indigenous to the ancient core sample and not caused by contamination during the retrieval and study process. Research on these microbes could help us better understand the very early evolution of life, as well as the search for extraterrestrial life in similarly aged rock samples brought back from Mars.
