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.
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8 2021 HD
6.3 1976 HD
8 2021 HD
8.13 2021 HD
9.5 1993 HD
6.5 2021 HD
5 2015 HD
4.7 2020 HD
0 1969 HD
7.553 1991 HD
8.5 1998 HD
7.715 2001 HD
8.286 2016 HD
7.9 2020 HD
6 1975 HD
8.2 1980 HD
7.2 2023 HD
0 2022 HD
8 1984 HD
6.1 2015 HD
