(Perhaps electromagnetic stuff -- "as in the stuff of the universe" -- is the key. PH)
The electromagnetic stuff was in the excellent Einstein program currently being broadcast.
Also, you may go to amazon, etc. to get to my novel CHASING FREEDOM. Search for "The Theory Of Relativity of Ping Pong Balls" to see writing I came up with years ago that deals with the sometimes randomness of people hurling through life, similar to the randomness of molecules bouncing around in space that Einstein contemplated.
