Transposon Recently Invaded Fly Genome (IMAGE) University of Veterinary Medicine -- Vienna Caption The P-Element is present in D. melanogaster for more than 60 years. It recently also invaded D. simulans. Credit Photo: Markus Riedl/Vetmeduni Vienna Usage Restrictions The photo may only be used in the context of this press release. 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.