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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8.369 2023 HD
0 1978 HD
8.25 2023 HD
0 1970 HD
6.7 2020 HD
5.667 2023 HD
6.214 2022 HD
9.5 1997 HD
7 2015 HD
7.6 2023 HD
5.9 2023 HD
7.6 2023 HD
5 2015 HD
7.7 2001 HD
6 1975 HD
8.2 1980 HD
0 1984 HD
4.5 2004 HD
9 2012 HD
7 2022 HD
