Researchers have found exceptionally preserved organic matter inside samples of rock from the 3.5-billion-year-old Dresser Formation in the Pilbara region of Western Australia. Baumgartner et al provide exceptional evidence for the biogenicity of some of Earth’s oldest stromatolites through preservation of organic matter, including microbial remains, by sulfidization. Image credit: Paul Harrison. The Dresser Formation stromatolites have been thought...
