Cluster of Spring-Loaded Daggers (image) ETH Zurich Share Print E-Mail Caption This is a cluster of spring-loaded daggers inside a bacterium. Green shows them in their 'loaded' form, red after the dagger has been launched. Credit Leo Popovich Usage Restrictions None Share Print E-Mail 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.