Most everything but the beats on this track comes from the original 1923 recording of Gustav Holts' "The Planets," conducted by the composer himself (available here: https://www.youtube.com/watch?v=gsZFRoFGSvw). The segment included in the fade out comes from the same section of a more contemporary recording of the same piece (available here: https://www.youtube.com/watch?v=Isic2Z2e2xs). And if you've never heard it, you should at least listen to the "Mars" section at the beginning, which has to be the most metal piece of classical music ever composed.  

Tagses: (we can link these up later)

Link to the mp3 file:
What A Difference 100 Years Can Make
Link to this view of the song:
http://songaday.netscrap.com/songs/?scrap_id=6041&scrap_category=46