Disc jockey Alan Freed uses the term rock and roll to describe R&B, in an effort to introduce the music to a broader white audience.
The release of "Rocket 88", a song by Jackie Brenston and the Delta Cats. Some music historians consider this record to be the first rock and roll recording.
... Pizarro, (1471-1541), conqueror of the Inca Empire
Marco Polo, (1254-1323), travelled to China in the 13th century.
John Wesley Powell, (1834-1902), explorer, ...