Here's a copy of the 1957 General Dynamics LP ("long playing vinyl record"), of Edward Teller talking about Einstein's theory of relativity and generally on the structure of the universe.
You can probably get more apt descriptions of those subjects elsewhere, but there's nothing like hearing that old bag of shit lecturing you.
Side 1: The size and nature of the universe.
Side 2: The theory of relativity.
Here's the discogs page on this record. I have a copy of the record but the images on this page were taken from discogs.