Puma (image) University of California - Santa Cruz Share Print E-Mail Caption Mountain lions fear humans, fleeing when they hear human voices. Credit Sebastian Kennerknecht/pumapix.com Usage Restrictions Photo credit must be given. Share Print E-Mail 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.