The 380-million-year old heart fossil (IMAGE) Curtin University Caption The Gogo fish fossil where the 380-million-year-old, 3D preserved heart was discovered by researchers. Pictured at the WA Museum. Credit Yasmine Phillips, Curtin University Usage Restrictions No restrictions. License Public Domain 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.