Check out this outstanding mashup by the pioneering dj/musician Osymyso. This 8 minute mix features 50 samples from the past 35 years of music. Nobody does mashups better than this guy. The Quietus Mix gives the seminal Intro-Inspection (also by Osymyso) a run for it's money!
For further listening, including Intro-Inspection check out Osymyso's archive.