(IMAGE) Champalimaud Centre for the Unknown Caption The fly's heart (left) - a minuscule structure made of two single rows of cells - is imaged non-invasively while the fly walks freely on a custom-made device (right). Credit Charlotte Rosher, Moita lab, Champalimaud Foundation. Usage Restrictions Use only with appropriate credit 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.