Forty years.
That's how long AC/DC has been rocking the planet.
The group formed in November of 1973 with brothers Malcolm and Angus Young.

AC/DC is one of the highest grossing bands of all time.
Did you know the idea for Angus Young's stage outfit, a school-uniform stage outfit came from his sister, Margaret?
Happy Birthday AC/DC, let's celebrate 40 years with this video from a 1977 UK TV appearance.