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Overview not available
Release Date
Aug 15, 2010
Episodes
2 episodes
CAST
![](https://image.tmdb.org/t/p/w92/4IMbAHM8KSIAUfb4zSGVA9QSFnW.jpg)
Derek Muller
Presenter
EPISODES
1
How long does it take for the earth to go around the sun?
Aug 15, 2010
2
What causes the seasons?
Aug 16, 2010