I saw this show on Discovery I think. It was a few years back. The reason this video is so important to me is because of an enigma I was dealing with myself for many years involving the theory of relativity.
I was always fascinated with that theory mainly because of how time slowed down for people who were moving, compared with people standing still. And furthermore, how such a simple thing like speed could affect aging, which to me seemed very hard to understand. The two were completely different from each other. That is, of course until I saw this show.
This clip showed me in terms I can now understand. Now I see how someone could fly away at the speed of light for maybe a day, and age only one day, yet my friend on earth has aged let's say 50 years.
I studied the theory for many years, but could never get over that one bump in the road, until I saw it with my own two eyes. Now, it makes total sense.
Enjoy!
P.S. The clock at the end is where the focus of this is. It's only about 4 minutes, so be patient, and it'll be worth your time. Gauranteed!
http://www.youtube.com/watch?v=V7vpw4AH8QQ