Israel Nature and Parks Authority hopes to finish the delicate job of hand-cleaning rocks by year's end

Parks authority says the artifact, uncovered in an underwater dig at Tel Dor, was first used in the Bronze Age and is similar to other anchors uncovered in region

Researchers estimate wave was 50-130 feet high and reached 1.5-3.5 kilometers inland, possibly explaining absence of signs of human habitation in area south of Haifa