Formation of Small Vesicles (IMAGE) Helmholtz Centre for Environmental Research - UFZ Caption Formation of small vesicles indicate that Candidatus Argoarchaeum ethanivorans divide by budding. The researchers detected these structures with a high-resolution Helium Ion Microscope. The Archaeal cells are extremely small- - on average, they are 100-fold thinner than a human hair. Credit ©Matthias Schmidt / UFZ Usage Restrictions None License Licensed 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.