Map (IMAGE) Aarhus University Caption The black dot in the Mediterranean Sea shows where the sediment core was collected. This site receives terrestrial material from northeastern Africa, which was affected by the African Humid Periods that changes the landscape and vegetation. Credit Nature Communications Earth and Environment Usage Restrictions Only for use in communicating this story. 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.