Rodney Carmichael

Hip-hop turns 44 today, and Google is giving mad props with a Doodle that drops science on the birth of the breakbeat. In addition to detailing the legendary 1973 party at 1520 Sedgewick Avenue in the Bronx, where DJ Kool Herc originated the style of playing two versions of the same record on different turntables to extend the break, users get an interactive tutorial in the art of crossfading and scratching.

JAY-Z opens his latest album, 4:44, by slaying his own ego.

For an MC who's spent his entire career constructing such a formidable facade, it's a tall task. But "Kill Jay Z" sets the stage for what becomes his most personal, vulnerable album yet — and arguably one of his best.