Mysterious Ancient Markings

Ancient markings found at a Jerusalem excavation have experts scrambling for their books and scratching their heads. The mysterious V shaped carvings were found in a dig known as "The City of David" and no clues were found near the objects to explain their purpose. This guy thinks aliens did it...

though scientists have so far refrained from positing a theory.
http://news.yahoo.com/experts-stumped-ancient-jerusalem-markings-071348189.html