Illustration Stowaways in the Genome (IMAGE) University of Innsbruck Caption The scientists analysed several gigabyte of microbial DNA sequences. Credit Fabian Oswald Usage Restrictions Only use in the context of this press release 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.