Cells (IMAGE) Arizona State University Caption In addition to competing for resources, living cells actively kill and eat each other. New explorations of these "cell-in-cell" phenomena show they are not restricted to cancer cells but are a common facet of living organisms, across the tree of life. Credit Jason Drees for the Biodesign Institute at Arizona State University Usage Restrictions None 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.