Mongolian Gazelle (image) University of Maryland Share Print E-Mail Caption A Mongolian gazelle wears a GPS tracking collar that logs the animal's movements through its home range. A new global study of 57 mammal species quantifies the degree to which human-modified landscapes impede the movement of wild animals. Credit William Fagan Usage Restrictions None 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.