Excavations among what many scholars consider to be the world's oldest monumental buildings on the island of Malta continue to unveil surprises and raise new questions about the significance of these megalithic structures and the people who built them. Not least is the latest find - a small but rare, crescent-moon shaped agate stone featuring a 13th-century B.C.E. cuneiform inscription, the likes of which would normally be found much farther east in Mesopotamia.