News brief

Harvard discovers it has a rare copy of the Magna Carta. For decades, the university assumed it had a cheap copy of the landmark document in its collection, purchased for less than $30. But two researchers have concluded that it is actually a rare version from 1300 issued by Britain’s King Edward I. The original Magna Carta established the principle in 1215 that the king is subject to law, forming the basis of constitutions globally. There are four copies of the original, and until now, there were believed to be only six copies of the 1300 version.