Sleeping Places (IMAGE) University of Münster Caption Squares lined with stones and filled with gravel, and with mats or palm leaves as a bed, served as sleeping places in the Bayuda Desert in Sudan. The large number of dots shows the high frequency of these beds. Credit Copyright: Münster University/W.A.D.I.; screenshot Usage Restrictions The use of the image is permitted only in the context of this press release and with reference to the source. 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.