Archaeologists have discovered mysterious stone carvings at an excavation site in Jerusalem. The carvings - which were engraved thousands of years ago - have baffled experts. Israeli archaeologists excavating in the oldest part of the city discovered a complex of rooms with three "V" shapes carved into the floor. Yet there were no other clues as to their purpose and nothing to identity the people who made them. Some experts believe the markings were made at least 2,800 years ago and may have helped hold up some kind of wooden structure. Others say an ancient people may have held ritual...