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Release Date: 07 Sat, Apr 1984
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.
100 Episodes
as お姉さん
2009
1985
2004
2020
1985
2001
2002
1993
2004
1996
1981
2012
1997
2006
1995
2011
