What has johnny cash done that has made an impact in music today?

Johnny Cash is often considered the most important voice of the Country music genre, and one of the most famous performers in the history of music. He has an illustrious career, receiving 11 Grammy Awards, and being the winner of multiple awards, among the most important ones: Kennedy Center Honors, the National Medal of the Arts, and the Grammy Lifetime Achievement Award. Johnny Cash has also being inducted to the Country Music Hall of Fame, the Rock and Roll Hall of Fame, and the Songwriters' Hall of Fame. For all these reasons, Johnny Cash has made an impact on today's music.

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.