Archaeologists puzzled by Roman coins found on shipwreck island.

Two silver coins from the Roman Empire were discovered on a remote island in the Baltic Sea, halfway between Sweden and Estonia, leaving archaeologists baffled as to how they got there. The coins may have been left by Norse traders, lost in a shipwreck, or brought there on a Roman ship that voyaged to the far north. The island, Gotska Sandön, is uninhabited today but was home to lighthouse keepers in the 19th century and was known as a place of shipwrecks and as a haunt for pirates.