Living microbes discovered in 2-billion-year-old rocks Earth.com2-billion-year-old rock home to living microbes | The University of Tokyo u-tokyo.ac.jpOldest living microbes found in 2-billion-year-old rock Popular ScienceMicrobiologists Find Living Microbes in 2-Billion-Year-Old Rock Sci.News2-billion-year-old rock harbors living microbes, rewrites life’s history Interesting Engineering