The use of verse to transmit cultural information continues today. Many Americans know that "in 1492, Columbus sailed the ocean blue". An alphabet song teaches the names and order of the letters of the alphabet; another jingle states the lengths and names of the months in the Gregorian calendar. Some writers believe poetry has its origins in song. Most of the characteristics that distinguish it from other forms of utterance—rhythm, rhyme, compression, intensity of feeling, the use of refrains—appear to have come about from efforts to fit words to musical forms. In the European tradition the earliest surviving poems, the Homeric and Hesiodic epics, identify themselves as poems to be recited or chanted to a musical accompaniment rather than as pure song. Another interpretation is that rhythm, refrains, and kennings are essentially paratactic devices that enable the reciter to reconstruct the poem from memory.