Sound Waves and Roswell, NM
I've always been interested in science. I started college as a physics major and even though I went in a different direction, physics has always interested me.
If you've got an hour of time to kill and are interested, you should look at the youtube video embedded below. Not only will you learn something interesting about sound waves, but you discover the real story behind Roswell, NM and the flying saucers from one of the top physicists in the world today, Dr. Richard A Muller.
So... enjoy.