Figure 1 (IMAGE) Tohoku University Caption Filamentous microfossils from the 1.9 billion-year-old Gunflint Formation studied in this research and the newly proposed sample preparation method. The rock is dissolved in acid to isolate the microfossils, which are then deposited onto ITO glass. Credit ©Tohoku University Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.