2 Jahreszeit
16 Folge
Secret Underground - Verborgene Geheimnisse - Season 2 Episode 6
A strange cave freezes in the summer and melts in the winter, and a massive sand dune swallows a small child in an instant. Rob Nelson and Stefan Burns use cutting-edge technology to investigate these mysteries of the natural world.
- Jahr: 2017
- Land: United States of America
- Genre: Reality, Documentary
- Studio: Science
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