2015 Event Scientists using geophysical methods to map underground archaeological sites have discovered a set of stone monoliths buried 3 feet deep near Stonehenge; the stones are estimated to be 4,500 years old 2012 Event Between 60 to 70 artifacts of the ancient Olympic games are stolen by thieves who broke into the Archaeological Museum of Olympia in Greece 1963 Event Archaeological digs begin at Masada, Israel 1906 Event Archaeological Institute of America forms