This article first appeared on the Atlantic Council site. Two years after the Islamic State militant group (ISIS) seized Raqqa and a number of areas in Syria, it successfully asserted itself and its ...

In Syria and Iraq, the militant group Daesh (also known as ISIS) may use crosses to conduct public crucifixions of people it believes to be spies. But in the schools it runs in its so-called ...

It’s a complaint many algebra teachers are familiar with, as more letters and symbols are introduced with progressively harder courses in mathematics. But why did the plus symbol emerge as the ...