Archaeologists in Sweden unearthed a 5,500-year-old burial chamber, known as a dolmen, possibly belonging to a chieftain during the Stone Age. The discovery was made at a large stone monument shaped like a ship known as Ale's Stenar. Researchers believe that the tomb, possibly older than Stonehenge in England, was robbed of stones to construct the Viking-era monument. "The scenic place on the ridge must have attracted people in all times. It shows that people over a long period build their monuments and perform their ceremonies on the same sites," said Bengst Söderberg of the Swedish National Heritage Board.