![View Poster Image](https://image.tmdb.org/t/p/w342/pHI60tV3wo4G4SX0YHCfxYCG1I6.jpg)
Why is seawater salty? What causes volcanoes to erupt? Why don't man-made satellites fall from the sky? What makes people sleepy? Answers to these questions and more are in this animated title which explores topics of nature, customs, and technology.
Release Date
Apr 7, 1984
Episodes
1 seasons | 100 episodes
CREATED BY
Credits not added yet.
CAST
![](https://image.tmdb.org/t/p/w92/1VqyxdQZShzUzaqRWXDBmlJ4wtV.jpg)
Naomi Matsui
お姉さん
SEASONS