'39 and the Art of Time Dilation
Brian May makes Eddie Van Halen's mom (mum for those whose parents didn't have the guts to travel west) wonder where she went wrong:
1. World class guitarist (check)
2. Millionaire (check)
3. Ph.D in Astrophysics . . . dangit! Eddie, go study.
This song is about Einstein, time dilation, and cool.