Microfossils of N.majensis (IMAGE) University of Liège Caption Image of Navifusa majensis, a microfossil from the McDermott Formation in Australia. This 1.75 billion-year-old microfossil contains thylakoids, which identify it as a cyanobacterium. Credit Emmanuelle Javaux Usage Restrictions No restriction 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.