Even in prehistoric times, people living near the sea had to deal with the risk of flooding. In fact, the remains of what seems to be a coastal defence barrier have come to light off the Israeli coast. The wall that stretches over 100 meters protected a small community of Stone Age people around 7000 years ago. According to archaeologists at the University of Haifa (Israel), it is the oldest and most impressive sea wall ever identified. Unfortunately, however, it did not prevent the village from being submerged.