Handle (IMAGE) ETH Zurich Caption The objects shown in these microscope images have a width of 15 to 35 micrometres. In comparison, a human hair is approximately 50 micrometres wide. Credit ETH Zurich / Luca Hirt 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.