The birth of hip hop started in the 80s
http://www.scaruffi.com/history/cpt417.html

A Brief History of Hip-hop
http://www.scaruffi.com/history/hiphop.html

hip hop is made of rapping and scratching records
http://ezinearticles.com/?History-Of-Hip-Hop&id=429044

hip hop is a form of african music
http://www.answers.com/topic/history-of-hip-hop-music

Hip hop music - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Hip_hop_music

The "Definition" of Hip-Hop and Rap Part 1: The Status Quo
http://www.jam2dis.com/j2dhiphophistory1.htm

A Brief History of Hip-Hop and Rap
http://rap.about.com/od/rootsofraphiphop/p/RootsOfRap.htm

Physical Graffiti The History of Hip Hop Dance
http://www.daveyd.com/historyphysicalgrafittifabel.html

Hip Hop Dance Videos and DVDs
http://www.centralhome.com/ballroomcountry/hip_hop_dance_videos.htm

DV8 Dance Party
http://dv8danceparty.com/