core pollen sample (IMAGE) Penn State Caption A sediment core taken from the East African lake, Lake Malawi. Pollen data were obtained from this sample. Credit Sarah Ivory, Penn State Usage Restrictions non commercial use only 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.