BAS_HSV_01 (IMAGE) University of Leicester Caption Brian Stewart surveying the extensive scatters of stone artefacts observed along the margin of a now-dry lakebed near Swartkolkvloer. Credit Brian Chase Usage Restrictions Use only with credit License Original 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.