Two Chambers (IMAGE) University of Pennsylvania Caption In a new study in mice, researchers at the University of Pennsylvania have shown that mental 'map' and 'compass' systems work independently. A cue that unambiguously provided both types of information allowed the mice to determine their location but not the direction they were facing. Credit University of Pennsylvania 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.