The Cyrillic alphabet, the script of Russians (and others), is one of the most widely used systems of writing in the world.

As the leader of the Ludlow miners, Greek-American Louis Tikas went on strike over the inhumane working conditions at the Rockefeller mines.

Instead, this letter has its origin in an ancient Greek symbol called a 'Christogram'. According to the expert, the nickname emerged from a long-forgotten joke about Jesus' initials.

The White House shared a formula containing symbols like epsilon and phi—but critics pointed out they served no purpose.