Diver (IMAGE) Washington University in St. Louis Caption Coastal and underwater cave sites in southern Sicily contain important new clues about the path and fate of early human migrants to the island, according to a new study in PLOS ONE. Some of the sites are above ground, while others are submerged caves and hidden grottos accessible only by sea. Credit Ilaria Patania Usage Restrictions For editorial purposes 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.