Cal Bear Mascot (image) University of California - Berkeley Caption The Cal Bear mascot design, about 1.5 centimeters long, was made from a sheet of kidney cells. The design demonstrates the versatility of patterns that are possible when directing sheets of cells to move. Credit Image by Daniel Cohen Usage Restrictions All rights reserved. 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.