Evil Envoys (VIDEO) University of Iowa This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Researchers at the University of Iowa tracked in real time the movement of individual cancerous breast tissue cells. The video shows how the cancerous cells extend and probe for other cells, then reel in cells to form ever-larger tumors. It's believed to be the first time that tumor creation has been shown in continuous, real time. Credit David Soll laboratory, University of Iowa Usage Restrictions None 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.