Ariana Grande's "Problem," featuring Iggy Azalea, is on track to score one of the biggest sales debuts ever for a digital song. By Keith Caulfield Ariana Grande’s “Problem,” featuring Iggy Azalea, is ...

A long-standing puzzle seems to constrain how addition and multiplication relate to each other. A graduate student has gone further than anyone else in establishing the connection. In 1983 the ...

A new series of papers has settled a long-standing question related to the popular game in which players seek patterned sets of three cards. In a series of papers posted online in recent weeks, ...

Before you reflexively say “the world has tons of problems!” (which is true), you should know that all the lab data and naturalistic (real world) data point to the existence of a sort of “distress ...